What Is a ListentoYouTube Virus and How to Remove This?

On the off chance that you were searching for an approach to convert YouTube videos to MP3, you may have discovered the ListentoYouTube virus. A greater amount of aggravation than a 'full' virus, it's despite everything quick to disrupt your perusing exercises and a long way from something you need on your system.

What Is the ListentoYouTube Virus? 

The ListentoYouTube Virus is a bothering type of adware/malware that may have a valuable reason at first, yet also carries with it various pop-up ads, sidetracks, and warnings.

It's a piece of a website that permits you to glue a YouTube interface before having the substance converted to MP3, however, commonly the subsequent file accompanies adware appended to it.

Alone, it's simply aggravating instead of dangerous, however, it can free your computer up to the dangers that originate from review risky advertisements, for example, progressively detestable viruses or trojans.

How Accomplishes ListentoYouTube Work? 

By all accounts, ListentoYouTube appears to be an ordinary instrument. Its website is intended to convert YouTube videos to MP3. Clients simply give a connect to the video, at that point click the download button to get the video.

Be that as it may, ListentoYouTube utilizes various publicizing networks to show pop-up ads and banners. Individuals who get to the webpage are regularly diverted to different questionable websites that can lead them to download suspicious files or tapping on stressing joins.

Visiting such websites and clicking ads can be only irritating. Notwithstanding, it likewise leaves your system less secure as though you're confronted with different banners and advertisements, you may wind up misclick and unintentionally opening one more effectively than without the virus on your computer.

The ListentoYouTube website can likewise incorporate a suspicious .exe file with your downloaded MP3s, with those files frequently containing a Trojan or other type of virus.

Significantly, you delete the danger rapidly so the issue doesn't heighten and deteriorate.

How Would I Realize I Have the ListentoYouTube Virus? 

The ListentoYouTube virus is very simple to spot as you're probably going to be barraged with pop-up ads and banners. Likewise, if you get an extra file close by your downloaded MP3, you realize you've gotten some type of virus.

The pop-up ads will, in general, be for new sounding websites that sound suspicious. On more established computers, you may discover it easing back the system down and in any event, making it crash if there are an excessive number of browser windows to fight with.

It's the reason it's essential to run at least a free antivirus software sweeps or use malware identification apparatuses to recognize any potential issues before they deteriorate.

How Could I Get the ListentoYouTube Virus? 

In light of how ListentoYouTube functions, the best way to run into it is on the off chance that you've gone to the ListentoYouTube website and downloaded an MP3 through its administrations, or tapped on a suspicious advert.

It merits remembering that it's unlawful to download or convert videos from YouTube and other comparable websites which is another motivation to give ListentoYouTube a wide billet.

Download Internet Security for Free to get protected your device from the latest virus infection.

How Would I Dispose of the ListentoYouTube Virus? 

We'd emphatically suggest you run and routinely use antivirus software just as a malware expulsion application.

Antivirus software can take a few hours to finish the procedure, contingent upon the speed of your computer, yet it additionally offers you the best strategies were to evacuate the malignant files.

It's likewise worth introducing a malware expulsion instrument that recognizes malware like ListentoYouTube and deletes it before it brings on any further issues.

How Might I Abstain from Getting the ListentoYouTube Virus Once more? 

There are a couple of explicit manners by which you can bring down your odds of being re-contaminated with ListentoYouTube (or getting some other virus). There are additionally explicit tips that relate legitimately to ListentoYouTube.

1. Try not to peruse the website. It's unlawful to download videos from YouTube in any case. Try not to be enticed to utilize such administrations to dodge the standards.

2. Try not to tap on banner ads. At the point when a pop-up banner shows up when perusing a website, don't tap on it. Frequently, it's most secure to go to an unexpected website in comparison to remain on a webpage that immerses you with pop-up advertisements.

3. Update your antivirus software and malware protection. Keep your antivirus software and malware protection up to date. Always, use the best antivirus software for your PC. New virus definitions are discharged routinely and these keep your PC educated on what to search for with new virus and malware-based dangers.

Encrypt and Secure Data - Why It's so Important | Antivirus Software

The subject of "encrypting data" is contemporary: The number of stationary and mobile digital media and the time we spend with these media is growing. More and more communication processes in professional and private everyday life, trading processes, production processes as well as services and products are being digitized, outsourced to the cloud and thus, at the same time, sometimes more unprotected and more transparent. The “Internet of Things” is breaking into our hitherto non-digital everyday life with vehemence and will continue to dynamize data growth as a driver in the next few years.

The amount of digital data that everyone processes, stores or sends will continue to increase - the study "EMC Digital Universe" predicts a tenfold increase in the global data volume to 44 trillion gigabytes by 2020. In Germany, too, the amount of digital data is expected to increase from 230 to 1100 billion gigabytes almost fivefold.

More and More Risks - More and More Reasons to Encrypt and Secure Data

According to a Bitkom survey, 80 per cent of Germans believe that their personal data is no longer secure. At the same time, more and more people are using digital transport routes for their personal data and storing them in virtual drives outside of their own local sphere of control. This increases the risk of loss of data and privacy, as well as the likelihood of falling victim to digital crime. These are the three most important reasons and threat scenarios that speak in favour of securing and encrypting data over the long term:

·         Risk of Data Loss. Total ambivalence - although the sensitivity for data protection is high and the Germans feel enormous fear for the security of their own data, many people are still very negligent with the security of their data and their storage media. You carelessly forego virus protection programs, firewalls and regular data backups or use easily decryptable passwords.

·         Risk of Spying and The Improper Use and Disclosure of Data. According to the Bitkom study, 52 per cent of Germans fear spying on personal data by the state or secret services. Ever since the Snowden documents were published, it has become clear that the protection of individual freedom and privacy is no longer possible without precautionary measures and techniques for encrypting the hard drive and encrypting e-mails or the use of anonymization software and/or anonymization hardware secured. The outsourcing data to insecure providers of cloud solutions can increase the personal risk of being spied on. By the way: Germans are no longer so happy to trust companies with their data: According to the survey, 48 per cent are sceptical because companies could misuse personal data to third parties.

Use Antivirus Software to Encrypt and Secure Data

·         Risk of Falling Victim to Online Fraud and Cybercrime. In the statistics for cybercrime, Germany ranks first with 46 billion euros in 2014, according to the American "Center for Strategic and International Studies". In no other country in the world is the damage caused by cyberattacks about economic output as great as in this country. But not only companies are at risk, but end users are also increasingly at risk. With methods such as phishing, pharming or malware in the form of malware, Trojans and the like. Cybercriminals and hackers try to spy on and misuse personal data. Remove Trojans and, instead, programs to protect against malware are indispensable building blocks of IT security.

Eight Tips Against Malware - This Is How You Can Effectively Protect Yourself Against Hackers and Cyber-criminals

Take secure and targeted action against malware and hackers

The day a new malware threat first emerges is called “zero-day”. On average, it takes around 18 days from "Zero Day" until the antivirus industry has developed software as an antidote to computer pests and protection against malware, Trojans and viruses. During this time, users cannot fully arm themselves against the new threat.

In all other cases, software solutions and certain rules of conduct offer the best possible protection to prevent malware infections. The most important tip: Up-to-date antivirus software or security suites are of maximum help in recognizing dangers, containing them and not even removing Trojans in the first place to have to. In the future, too, there will be a constant head-to-head race between malware programmers and antivirus manufacturers: the cybercriminals and developers of malicious code will not give up and will continue to try to outsmart the monitoring functions and always be one step ahead.

Eight Tips for Malware Prevention

Tip 1: Set up Antimalware Programs
It sounds banal, but it's hard to believe: As before, many computers are not yet or not sufficiently protected. The business with malware protection software is booming - in the face of old and new threats, digital data protection has never been as important as it is today. As an end-user, you can choose between free and paid anti-malware programs. Some current test results may help with the purchase decision:

·         Bootmgr

·         Focus

·         Network winner

·         PC magazine

 

Tip 2: Install a Firewall.
You can read here how this works and what you have to pay attention to, for example about blocking programs with an Internet connection. A firewall program is usually an integrated part of a security suite ( see tip 1 )

Tip 3: Allow Regular, Automatic Security Updates.
Even if it's annoying, antivirus programs and firewalls are useless without regular updates. The attackers recognize security gaps and exploit them. Regular updates should also be the standard for operating systems, browsers and plug-ins & add-ons!

Tip 4: Make Backup Copies of The Security Software on CD or DVD.
Many malware programs nowadays are designed to manipulate virus scanners. The result: the programs no longer update their virus signatures. Experts recommend copying security software from an uninfected computer to removable media, such as a bootable CD, and thus continuously checking your own computer.

Tip 5: Be Careful when Opening E-Mails, Downloading and Surfing.
Download files and programs only via secure, reputable portals and connections. Do not open email attachments from unknown senders. General: Do not click anything that you do not know. This not only protects yourself but also prevents other people's computers from being damaged afterwards.

Tip 6: Remove Unknown Toolbars.
Most browsers allow all installed toolbars to be displayed. Toolbars that are not needed should definitely be removed. Remove any that you don't necessarily want to keep. If a suspicious toolbar is not displayed or it cannot be deleted, the Internet browser should be reset to the basic standard. You can use toolbars to catch adware and spyware.

Tip 7: Only Download Updates from The Original Manufacturer.
Never follow a link when you receive a request to update your software. Always download the update from the manufacturer's website.

Tip 8: Protect Router and WLAN with a Password.
To do this, simply follow the instructions of the Internet provider or router manufacturer and choose your own secure password for protection. This means that hackers cannot access your router and, if necessary, change settings or spy on online activities. Home networks should be protected with the WPA2 setting.

Hackers Disguise Themselves as A Security Company | Total Security

A North Korean hacker group disguises itself as a fake security company and seeks contact with established security researchers to tap their knowledge in supposedly joint projects.

 

The Google Threat Analysis Group (TAG) has discovered a new tactic used by hackers. Threat actors, allegedly sponsored by the state and backed by the North Korean ruling party, have built a network of fake profiles on social media, including Twitter, Keybase and LinkedIn.

"In order to gain credibility and connect with security researchers, the actors set up a research blog and several Twitter profiles to interact with potential targets" said Google. "They used these Twitter profiles to post links to their blog, post videos of their alleged exploits, and to reinforce and retweet posts from other accounts they control."

When members of the group achieved their goals and gained a reputation in the security community, they would ask if their intended victim would like to participate in cybersecurity research - before sending them a malicious Visual Studio project with a backdoor. Alternatively, they ask the researchers to visit a blog that contains malicious code including browser exploits.

In a March 31 update, TAG's Adam Weidemann stated that the state-sponsored group has now changed their tactics by starting a fake, offensive security company, complete with new social media profiles and a branded website.

The fake company, called "SecuriElite", was founded on March 17th as secure elite [.] Com. SecuriElite claims to be based in Turkey and offers penetration testing, software security assessments and exploits.

Note: Always use authorised antivirus solution like Protegent Total Security to keep your data safe from online threats.

A link to a PGP public key has been added to the website. While the inclusion of PGP as an option for secure communication is standard, the group has used these links in the past as a means to lure its targets to a page where a browser-based exploit is waiting to be deployed.

In addition, the SecuriElite “team” was equipped with a new set of fake social media profiles. The threat actors pose as security researchers friends, recruiters for cybersecurity companies and, in one case, as the HR manager of “Trend Macro” - not to be confused with the reputable company Trend Micro.

The Google team linked the North Korean group to using Internet Explorer Zero-Day back in January. The company believes it is likely that they will have access to additional exploits and will continue to use them against reputable security researchers in the future.

"We have reported all identified social media profiles to the platforms so that they can take appropriate action," said Google. "At the time, we didn't see the new attacker website offering malicious content, but we added it to Google Safebrowsing as a precautionary measure."

Hackers Are Leveraging the Corona-Virus Pandemic | Free Antivirus Software

Hackers Are Targeting Corona-Virus Pandemic, Block Using Free Antivirus Software

Just as you quickly look at your cell phone in a store on Black Friday, you discover an offer from Amazon that is too good to be true and is only valid for the next two hours.

As the tax return deadline is approaching, you will receive an email from the tax authorities asking you to confirm some information immediately, otherwise, your refund will be delayed.

Or, following the recent catastrophic hurricane, an email from the Red Cross contains an urgent request for donations, allegedly to help those who lack shelter, food or clothing.

These are all examples of event-based email attacks that take advantage of current events such as holidays, sporting events, and natural disasters to create compelling phishing baits. Outstanding or current events have three important characteristics that make an email attack more likely to succeed:

• An inherent sense of urgency: the vacation or sporting event is just around the corner, or the disaster has just happened. One way or another, it creates a sense of urgency that can be exploited to provoke immediate responses.
• Important legitimate email traffic: Various parties (e.g., corporations, government agencies, nonprofits, etc.) are sending important messages related to the event and users are eagerly awaiting those messages.
• Confused users: Due to changing conditions in their real-world or because they experience a lot of emotions (worry, fear, anxiety, stress, etc.), users are confused and more inclined to neglect their vigilance.
• Coronavirus phishing and scams, as in the previous example of event-based email attacks are on the rise.

The latest lure for event-based email attacks is the global coronavirus pandemic - and it contains the features outlined above. Overall, the world feels an incredible sense of urgency as the number of cases skyrockets every day. Schools and most businesses are closed, so workers prepare to work from home while balancing it with their children. These closings and the first signs of an economic downturn are causing wild market volatility and unprecedented action by governments around the world.

All of this has left us tired, distracted, confused, anxious, fearful, and desperate and has left us looking for reliable information. While government agencies, businesses, schools, and other organizations are sending numerous legitimate emails about the coronavirus, hackers are taking advantage of this location to launch a wide variety of email attacks, including spam, fraud, phishing, spear-phishing, and malware. 

Based on our global visibility into email traffic, Protegent was the first to spot the usual flood of spam that COVID-19 is exploiting to peddle items like face masks. The following example is rather harmless, albeit unsolicited. The display name has been changed to Coronavirus Mask, but the message content highlights "Respirators against pollution and for clean air".

We have also seen a wide variety of email scams that are similar to spear-phishing in that they lack links or malicious attachments. In the example below, someone pretending to be an engineer for an offshore oil company offers the recipient an assistant job. Due to the coronavirus, this is a job where work is carried out from home, according to the email message.

Very quickly, however, we began to see more sophisticated phishing campaigns pretending to be the World Health Organization (WHO), the Centres for Disease Control (CDC) and the government agency (GOV.UK). The GOV.UK phishing email on the left claims that the recipient is eligible for a £ 128 tax refund in response to the coronavirus and leads them to a phishing page asking for the funds can access. On the right is a WHO phishing page that asks the user to verify their account information to download COVID-19 security measures.

With the US and other governments around the world approving stimulus plans, we expected additional waves of attack, lured with government support checks and another economic stimulus. Also, given the sharp rise in unemployment figures, we also expect an increase in fake job offers similar to the above example.

Introduction of Event Tracking for Protegent Antivirus for Office 365

While operator solution providers and IT administrators naturally have to deal with all kinds of threats, event-based e-mail attacks pose a particular challenge: How do I protect my end users from the sudden flood of threats while ensuring that legitimate important ones are not accidentally Communication is blocked? During this time of global crisis, we at Protegent felt deeply responsible to contribute in our unique way to effectively managing and containing the pandemic.

With that in mind, we've released a new event tracking feature for Protegent for Office 365. The feature gives operator solution providers and administrators better insight into all - both malicious and legitimate - email traffic primarily linked to the coronavirus pandemic.

In the Email Logs section of the Protegent for Office 365 Admin Console, simply select the COVID-19 filter under Current Events to view email traffic, including all that Protegent has detected Coronavirus-related threats. If the filter missed something, you can use the Remediate function to pull the message from one or more inboxes. Equally important is that you keep an eye on legitimate COVID-19 communications and put them back in users' inboxes in case messages are misclassified.

COVID-19 is the first use case for the Protegent for Office 365 Event Tracking feature. More will be added over time in response to holidays and other one-time events that trigger spikes in threats and overall email traffic. The goal is to increase transparency and help operator solution providers build customer trust in these important times.

Resources to help users identify coronavirus threats and keep telecommunications safe.

In addition to this new feature, we've put together a collection of resources to educate end-users on how to recognize email threats during the coronavirus pandemic and how to work safely from home. The page contains infographics about digital hygiene and information on how to identify phishing and spear phishing attacks, but also links to free tools such as our free antivirus software.

Hackers Continue to Rely on The Fear of The Corona Virus | Total Security

How Hackers Use Corona Virus to Pretend You; Prevent by Using Total Security

In mid-February 2021, Security specialists had already reported on the immoral phishing practices of hackers who are taking advantage of the population's concern about the coronavirus. And it goes on. specialists exposed a new such attack in the last 24 hours. This time the hackers are mainly targeting Italians with their supposed corona message. The phishing email contains a document that supposedly offers a list of precautionary measures to prevent the infection. In fact, there is a macro hidden in the document that infects the victims of the phishing attack with trick bot malware. In this blog, we will learn how to prevent them by using total security.

According to Security specialists, cybercriminals are surfing the cutting-edge COVID-19 wave to spread the malware as efficiently as possible. However, the actual malware mechanisms used to spread the message (including the spambots, the attached script-infested Word document, and the JavaScript droppers) are similar or even identical to those used in Trickbot campaigns for at least six months.

“The cybercriminals behind Trickbot are trying to take advantage of people's concerns so they can click and open the attachments. While this malware attack is happening in Italy, we expect similar attacks in other countries where fear of COVID-19 outbreaks is also high. The best way to avoid this type of cyber attack is to turn off macros. You should also be extra careful with clicks on attachments and links and delete emails that appear suspicious or come from an unknown source, ”said Chester Wisniewski, Principal Research Scientist at Sophos. "Whenever there is an issue of public interest like COVID-19 or the Australian bushfires, cybercriminals see it as an opportunity to manipulate their victims."

Tips to Ward Off Phishing Emails:

• Never be pressured to click on a link in an email. It is important to disregard supposed and unexpected advice. If you really need advice on the coronavirus, doing your own research with the known authorities and institutions is the right way to go.
• Never let the name of the sender influence you. This new phishing attack supposedly comes from the “World Health Organization”. However, the sender can enter any name in the “From:” field.
• Watch out for spelling and grammatical errors. Not all crooks make mistakes, but many do. Take the time to check the news for any tell-tale signs of fraud. Often the attackers are not really able to speak the language.
• Check the URL before clicking on a link. If the link to the website looks strange, don't click it.
• Never provide any information that you are asked for on a website. There is no reason a website should ask for health awareness or an email address, let alone a password.
• If you have accidentally given a password to a fraudster, it must be changed immediately on the correct website. The scammers who operate phishing websites usually try stolen passwords immediately and often automatically. The sooner you react, the more likely it is that you will forestall cybercriminals.
• Never use the same password on more than one website. Once scammers have a password, they will test it on every website that one could have an account on.
• Use two-factor authentication (2FA). The six-digit codes that are received on the mobile phone or generated via an app represent a small further step for the user. But they are a big barrier for fraudsters.
• Companies should train their employees. Tools like Protegent Total Security simulates the tricks of phishing crooks company-wide but in a secure environment. Protegent also offers a free antivirus toolkit that includes posters, examples of phishing emails, and other tips for tracking down phishing emails.

Firewall and Antivirus: Is It Better to Use Together

Firewall and Antivirus: Can We Use Both Simultaneously

Both firewall and antivirus are security mechanisms designed to protect your system. A firewall is a low-level network security system designed to protect your system and network from malicious damage. Antivirus, on the other hand, is a software utility program designed to protect your computer from insider threats like viruses, malware, spyware, etc.

 

The purpose of a firewall is to restrict any unauthorized access to the system by monitoring network traffic inside and outside the system. It inspects the flow of data from the Internet to the system to decide which should be allowed and which should be restricted. The purpose of an antivirus program is to detect, scan, prevent, and remove harmful programs that can compromise your computer.

Typically, a firewall works at the network protocol level to protect public and private networks from unwanted intrusions. Setting up a firewall has its benefits, but it also has its drawbacks. It can only prevent unauthorized access between computer networks based on a predefined set of network protocols. Antivirus, on the other hand, works at the file level, which means that the software program will only search for harmful programs that are installed on your system, such as Trojans, adware, spyware, malware, rootkits, Keylogger, etc.

Is Virus Protection Enough?

Users often ask about the most appropriate way to configure their computers to protect against threats such as worms and Trojans. They claim that they have installed virus protection and that they have never opened spam email attachments.

Still, they wonder if those measures are enough. Antivirus protection is a fundamental part of an effective protection solution. It allows you to detect known threats and many that are new using heuristic technologies. But another technology can help strengthen your protection: a firewall.

How the Firewall Helps You Protect Your Website Vulnerabilities

While antivirus software helps you protect your file system from unwanted programs, the use of firewalls prevents attackers or external threats from accessing your system.

Other threats spread from computer to computer without the user noticing. If one of those computers has low-security settings or unpatched vulnerabilities, they can infiltrate the system without the user noticing. A good number of worms and Trojans, also called “bots”, spread in this way, using the Internet to search for computers to infect. The user will never realize that his system is in danger because the threat infiltrates his computer stealthily.

This is exactly where the firewall protection works.

The firewall monitors all network traffic and has permissions to identify and block unwanted traffic. The fact that today most computers are connected to the Internet provides attackers with endless potential victims. Attackers probe other computers connected to the Internet to determine if they are vulnerable to various kinds of attacks. When they detect a suitable victim, they can bypass your security systems and infiltrate that computer. At this point, the attacker can force the team to do just about any task he wants. Attackers often try to steal personal information to commit financial fraud. All this activity takes place in the background, without the user being aware of what is happening.

There are two basic classes of firewalls: client firewalls and firewall teams.

A client firewall is a software that resides on the computer itself and monitors all network traffic on that computer.

A computer firewall is a physical device connected between the Internet and the computer.

These devices are often used in small network environments where multiple computers must share the same Internet connection. Small routers in many homes and offices often have built-in firewalls. If you use a router, make sure it has a firewall.

Both of these types of firewall can prevent unwanted access to your computer.

Users who physically roam should always have a client firewall installed on their system. When we connect to the Internet outside of the office or home, we cannot take chances.

While antivirus software is an excellent means of protection, adding a firewall can be that right hook that knocks the attacker out of the game.

Types of Computer Viruses and Antivirus to Prevent | Antivirus Software

Types of Computer Viruses and Antivirus

What Is an Antivirus?

An antivirus is a program with which it is possible to protect a computer against most viruses, worms, Trojans, among other invaders that are unwanted and that have been designed to infect computers.

They are characterized by being advanced programs that are not exclusively dedicated to detecting viruses, but rather take on the task of blocking them, disinfecting files that have been modified and preventing new infections.

Antivirus Classification

• Preventive Antivirus - They are characterized by being in charge of warning before an infection occurs. In general, this is a type of antivirus that is present in the computer's memory, monitoring each of the actions and functions of the system.

• Antivirus identifiers - These are those whose objective is to identify programs that can infect the computer and therefore affect the system. On the other hand, they also track specific code sequences that may be linked to viruses.

• Decontamination Antivirus - They are similar to identifier antivirus, but in this case, their speciality lies in decontaminating a system that has already been infected, due to the action of malicious programs. In this case, the main objective is for an operating system to be as it was at startup.

Forms of Computer Viruses

There are many types of computer viruses that can be identified today, so it is important to know them, to improve the defence of the devices:

 

1. Worm or computer worm - It is a type of malware that is characterized by staying in the memory of the computer and that is duplicated in it without the user intervening in the process. They typically consume a lot of bandwidth or system memory.
2. Trojan horse - It is a class of computer virus that hides in a legitimate program, so that when it is executed it begins to damage the computer. To a large extent, it affects the security of the PC so that it is completely defenceless and in turn capture information that is sent to other sites, such as passwords.
3. Logic or time bombs - They are characterized by being activated once a specific event occurs. You can think of a combination of certain keys or a particular date. In case the fact does not happen, the virus will simply remain hidden.
4. Hoax - They do not have the ability to reproduce on their own and the truth is that they are not true viruses. In reality, they are messages with content that is not true and that ends up encouraging the user to forward the information to the contacts. Normally, these fake viruses seek to overload the flow of information through emails and networks.
5. Link - They are viruses that modify the addresses through which the computer is accessed through which it resides. In that sense, they make it impossible to locate the files that have been stored.
6. Overwriting - They are computer viruses that cause the loss of the content of the files they attack. This happens because it overwrites the previous one.
7. Resident - It is a virus that remains in memory and waits for the user to run a file or programs to infect it.
8. Boot Sector Viruses - They lodge in the hard drive's boot sector, a crucial part of the disk that is needed for the computer to boot from the hard drive.
9. Macro viruses - They infect files using applications or programs that contain macros, such as Microsoft's office suite. Due to their characteristics, they can automate a series of operations so that they are executed as if they were a single action.
10. Polymorphic viruses - They are viruses that are encrypted or modified in a different way through algorithms and encryption keys once they manage to infect the system.
11. Fat virus - The fat file allocation table is a part of the hard disk that is used to store the information about the location of the files, the space that cannot be used and the space available. They prevent access to certain sections of the disk.
12. Web scripting virus - Complex code for creating interesting content is included on some websites. This type of code is sometimes exploited so that computer viruses cause undesirable actions for the user.
13. Browser hijacker - These are viruses that spread in many different ways, such as a voluntary download. If the browser is infected, the user will be automatically redirected to certain sites.
14. Email virus - It spreads through emails, once the recipient opens them. 
15. Companion virus - It is a virus that infects files directly and in turn to
16. Resident Types (viruses). As for accessing the computer, they can accompany other existing files.
17. Multipartite virus - It is a virus that can spread in various ways. Among its actions, depending on the operating system will be adjusted. They almost always hide within memory without infecting the hard drive.

What Are the Limitations of An Antivirus?

• Do not avoid spam - In some cases they offer online protection, but the truth is that they are not entirely effective.

• They do not prevent direct attacks - In case a person with advanced knowledge until the own computer, they are not in a position to be a defence.

• They do not prevent criminal activities - Nor are they software capable of this work.