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Everyone wants to be confident in their computer and hope that it is free of various viruses, Trojans or banal surveillance.

Today I will try to help you dispel your guesses and show you how to independently check your computer for malware and, if detected, immediately neutralize it. Let's fight for computer cleanliness together.

Introduction

Usually, users remember about antivirus programs only after they have picked up something interesting on their computer. In most cases, panic begins and measures taken during this panic can only worsen the current situation.

What you need to know before trying to remove a virus

I will immediately explain why. The main problem is that having caught a virus, a person “runs” to the search and enters the query - “How to remove a virus from a computer?” It seems that the idea is correct, immediately find information on how to properly remove malware and immediately repeat all this on your computer.

On the one hand, it seems that it simply cannot be simpler, but as a result of following many instructions, nothing helps or gets even worse. The fact is that this situation also has a “second side”, which for some reason users ignore citing emotions, panic and the desire to remove the virus faster.

What is really happening at this moment? And the problem is that while browsing the sites you download programs that you know little about and download from the unknown site “Vasya Pupkina”, and then, in the evening, you start writing on all the forums that the programs you were told about simply suck and are themselves viruses . You even start advising that no one should download it, it’s all a scam. Have you tried turning on your brain? After all, besides how to download antivirus utility hundreds of thousands of articles warn you that you can only download from the official website, and everything else is unreliable.

You yourself, under the guise of anti-virus software, download harmful programs as ballast and there is no need to say after that that everyone is to blame except you. Why am I saying all this, I’m a little heated by the current situation and so I’ll now tell you about three good anti-virus scanners that you can use absolutely free.

I will definitely give you links to download exclusively from official sites - this is the key to success, because not one normal company will promote its product with viruses to its detriment. Therefore, we read, download and no longer torment ourselves with the question of how to remove a virus from a computer.

Learn how to efficiently scan for viruses on your computer

I’ll say right away that all the utilities that I’m about to write about are not intended to be installed to permanently protect your computer; they should be used exclusively to remove viruses that you have already picked up.

Therefore, after thoroughly cleaning your computer from harmful software Don't forget to install an antivirus for constant protection.

Okay, let's get down to business, I'll show you 3 good anti-virus scanners, and you don't choose from them, but download all three in a comprehensive manner and scan your computer with each program in turn. Why ask? Yes, because there is no perfect protection and the more options you use, the more reliable the result you will get. 3 scans should be enough to thoroughly check your computer for viruses

Now a little more about each scanner.

Dr.Web CureIt scanner

Malwarebytes Scanner

Appearance at the time of writing

After using these programs, you will be able to neutralize most known infections and thereby protect your computer. . But I warn you, it is merciless and if you are negligent, you can “kill” the entire operating system along with viruses. Now it’s time to relax a little and consolidate your knowledge with practical examples.

Watch video: How to check your computer for viruses for free?

I will close the topic here, but I hope to hear your opinion on this issue. Tell us what you use to remove viruses?

Computer security is one of the most important things every user should think about. Since everyone now has a lot of confidential and personal information, the disclosure of which is unacceptable. Also, computer accounts are often linked to bank card and other data that should not be accessible to unauthorized people. Unfortunately, the virus threat still exists on the Internet, and attackers are trying to gain access to personal data through malicious files, and sometimes they even manage to completely control the actions of someone else’s computer.

To protect their devices, users usually install antivirus programs and try not to visit untrusted sites. However, antiviruses are usually very expensive and also have a detrimental effect on computer performance. But not many people know that it is also possible to check your computer for viruses without an antivirus. The fact is that in the composition operating system Windows, starting with Windows 7, has a built-in antivirus called Windows Defender. Usually this component is in a disabled state because another antivirus product is running on the computer. However, the Defender himself has a very good characteristics and copes well with any viral threat.

Quick navigation through the article

Scanning

To scan your computer for viruses with Defender, you will need:

Open the Start menu.
Use the search function and enter “ Windows Defender».
Launch the application from the search results.
Make sure the antivirus is active. If you receive a message that Defender is disabled, you need to enable it in the Settings section.
On the “Home” tab, click on the “Check Now” button.
Wait until the check is completed and review its results.

If Windows Defender finds infected and malicious files, they will be disinfected or deleted from the computer. Further the program will work in background, periodically independently checking and monitoring the security of files with which the user interacts.

other methods

For Windows computers there is also free version Dr.Web antivirus, which is called Dr.Web CureIt. This program is a demo version of a full-fledged antivirus, does not require installation and is perfect for a one-time scan of your computer for viruses.

To use the application, the user simply needs to go to the developer’s website drweb.ru and open the “Download” tab. In the “Demo” section you will find the application you are looking for, which you will need to download to your computer and run. The program does not require any settings and will automatically scan your PC for viruses and give its verdict, removing malicious content from the disk if necessary. It is recommended to regularly load fresh CureIt version, containing current versions antivirus databases.

If the antivirus installed on your computer does not detect anything suspicious, but the symptoms are obvious (freezes, incomprehensible running processes, appearing autorun.inf on flash drives, etc.), a “one-time antivirus” is necessary. It's easy to use - just download from the link and run it. In this case, during the scan, it is advisable to disable the antivirus that is installed on a permanent basis.

Advantages of disposable antiviruses

1. Free. For home use Almost all one-time antiviruses are free.

Flaws

1. They are not able to protect your computer all the time (there is no module for constant protection) and there is no update of anti-virus databases.

2. You have to download it again every time so that such an antivirus detects new viruses.

Dr.Web CureIt!

Dr.Web CureIt!- a good one-time antivirus. Knows how to fight running viruses(does not allow himself to be killed during scanning).

HerdProtect

An online antivirus that scans all computer files using 68 antivirus databases. I explained how to use it in a separate article.

This a good option, if unlimited Internet is connected.

Minus: does not know how to treat infected files.

Plus: You don’t need to download it again to check, the databases are always fresh.

Kaspersky Virus Removal Tool

ESET Online Scanner

Plus Online scanner - no need to worry about downloading new versions with fresh databases. Just open the link or run esetsmartinstaller_rus.exe, the antivirus will start, update and scan your computer for viruses.

Norton Security Scan

Norton Security Scan - another one-time antivirus. You can download the interface in English, but simple.

Checks hard disks very fast. Requires an Internet connection, like Eset Online Scanner.

When you first start it, it creates a shortcut to itself, which is strange.

In general, it is better not to use it, since viruses common in Russia enter its database a little late. The newest winlockers (ransomware banners) are unlikely to be detected.

AVZ or Zaitsev Antivirus

Powerful antivirus utility (not a full-fledged antivirus!) for advanced users. There is not a sea of functions, but a whole ocean.

Supports updating anti-virus databases from the Internet. Unlike disposable antiviruses, does not know how to treat infected *. exe files. It's more of an "anti-spyware" with many unique additional functions. I will quote the words of the author AVZ: “ The utility is a direct analogue of the Trojan Hunter and LavaSoft Ad-aware 6. The primary objective of the program is AdWare removal, SpyWare and Trojans.» The archive with the program contains help on all functions; it must be read carefully before the first launch.

Checking your computer online for viruses is not as simple as it seems. First, let's note the fact that completely scanning your HDD not possible for viruses. Most online services require uploading to a website specific file, archive or folder and only then check it. Only some do full scan PC. It's also worth noting that if your antivirus is up to date and working reliably, but the system is behaving strangely, you may need to remove a potentially unwanted program that is not a virus. Accordingly, such a program is not detected by a regular defender, and an online antivirus will not see it at all. However, if you need to perform an online scan of your PC and individual files, we offer a review of the best online antiviruses.

Review of free online antiviruses

We put ESET Online Scanner in first place in terms of scanning quality and speed, where you can scan for free, but only once, not easy separate files, but also the entire PC. To do this, perform the following steps:

Follow the link and click the “Run” button.

A small exe file will download. We save it to the desktop so that we can quickly delete it later. Then we start scanning.

We accept the terms of the license agreement.

Check the box “Enable detection potentially unwanted applications" Click “Scan”.

After loading the databases and other components this program perform a PC check.

It is worth noting that if you have an updated ESET antivirus installed, then high-quality protection Even from unwanted programs you will be protected.

In second place is the Dr.Web antivirus and its online analogue. To verify files using it, perform the following steps:

Follow the link to the resource website. Upload the file by clicking on the “Browse” button and then clicking “Check”.

The program will scan the file and create an archive with the scan results.

BitDefender antivirus also has online scanning. To run the scan in real mode perform the following actions:

Follow the link and click “Scan now”.

An extension will be added to the browser that will gain access to files on your PC. Only after this will scanning for viruses begin.

The online service from the developers of the Panda antivirus also broke into the top five. Online ActiveScan scans your system and files in the cloud.

To check if there are viruses on your PC, follow these steps:

Follow the link and click “Scan”. The browser will open Internet Explorer, as a special extension will be added to it. Click on it and start scanning.

The result will be displayed in the same window.

You can also check for free, without registering or installing extensions, using McAfee antivirus. Security resource Scan Plus works like this:

Follow the link and click “Run”. A small window will open. Click “Scan” and wait for the results.

The report will be displayed in the same window.

There are many other online antiviruses on the Internet that can also be used to scan files. However, we recommend that you regularly update your antivirus and not install applications from unverified developers.

Services that allow you to check your computer for viruses online are conventionally divided into three types: system scanners, file scanners, and tools for detecting spyware and adware modules.

System scanners check the entire contents of computer disks or only selected areas for the presence of malware.
File scanners check individual files specified by the user for cleanliness.
Spyware/adware detection tools are “tailored” to detecting threats exclusively of this type.

The first and third types are not always clearly separated from each other. Thus, anti-virus scanners can detect both obvious malware and potentially unwanted programs(for example, showing advertisements), which are not essentially viruses. And advertising search tools are responsive to known viruses and Trojans.

Online services differ from traditional antiviruses in that they:

They do not always require installation on a computer. However, almost all system scanners and adware/spyware scanners require downloading a scanner that uses cloud scanning technology. The loaded module transfers data about files from client machine to the server and receives a response from it whether the files pose a threat.
They weigh little because they do not have their own virus databases.
Cannot run autonomously. Any online scanner requires the Internet to operate.
They do not have algorithms for “curing” and deleting infected objects (with rare exceptions).
They do not have system protection functions.

- simple, easy and fast online scanner, capable of checking the system for free in a couple of minutes for the presence active threats, and also assess the state of computer protection - is it installed? antivirus program whether the firewall is enabled. Creates a security report after each scan. With constant use, it can be launched on a schedule.

McAfee Security Scan Plus is a worthy complement to McAffee's comprehensive antivirus product, which is already available for the money. It does not have malware removal functions - it only notifies you when threats are detected, and it does not always report which ones.

Advantages:

High scanning speed without slowing down your computer.
System security assessment function.
Russian localization.

Flaws:

It is aimed at users of the McAfeeTotal Protection antivirus and tries to persuade others to buy it.
Does not remove detected malware.
It does not always indicate which object (file, website) it considers dangerous. Clicking on the “Fix Now” button redirects to the developer’s main product purchase page.

- a more advanced solution compared to the McAfee scanner, as it is capable of not only detecting threats, but also removing them. Scans much slower, but deeper. Can recognize all types of malicious and potentially dangerous objects - viruses, spyware and adware modules, worms, Trojans, tools for hacking licensed software (keygens and cracks), etc. During the scan, it significantly loads system resources.

Panda Cloud Cleaner allows the user to choose the scanning area - all disks or individual directories (however Windows folder, startup areas and RAM are checked for any selection).

To “treat” an infected system, the program contains the following:

Quarantine and file deletion function.
“Kill all process” - a tool for ending all processes (makes it possible to unload the active one from memory malware, if this cannot be done differently).
“Unlock files” - file unlocking function.
“Send files to Panda” - sending suspicious files for analysis at the Panda virus laboratory.

Advantages of Panda Cloud Cleaner:

Rich enough for free program functionality.
Availability of “treatment” tools.
No connection to the developer's main product - Panda Internet Security.

Flaws:

Relatively low speed checks.
Lack of Russian language

— free product one of the world's most popular developers antivirus solutions— BitDefender SRL. Installed as a browser extension through which the download page was opened. Launched by clicking the “Scan now” button on the same page. According to the authors, it checks the computer for all types of active threats. There is no “treatment” function.

The scanning process takes less than a minute. Judging by this, the utility checks only active processes in random access memory and possibly malicious scripts in the context of the browser from which it is launched.

After verification, you will be unobtrusively offered to use Bitdefender for free for 6 months Internet Security.

Advantages of Bitdefender QuickScan:

Highest scanning speed.
No load on system resources.
Easy to install and remove.

Flaws:

Lack of Russian localization.
If it were not for the eminent developer, it would be unclear whether the service performs its tasks at all - the scanning is so fast.

Emsisoft MalAware - another free cloud antivirus scanner, which works without installation on your computer. Launches immediately after loading. Like most similar services, it only performs quick scan startup areas and active processes. For more deep check and “treatment” (if necessary) suggests downloading another paid product, Emsisoft AntiMalware.

The operating speed of Emsisoft MalAware is slightly slower than that of Bitdefender QuickScan - about 3 minutes. There is a Russian language and a log saving function.

Advantages of the utility:

High performance.
Work without installation.
Simplicity.

Flaws:

Poor functionality.
I got the impression that the program was created solely to promote paid products developer.

- free online service“domestic style”, developed by Kaspersky Lab and the famous anti-virus portal Virusinfo.info. Works in tandem with Oleg Zaitsev's AVZ utility, which is used as a collector of suspicious files from a potentially infected computer. Zip archive with copies collected files(quarantine) is transmitted via the Internet for analysis computing system"CyberHelper".

When uploading quarantine to the service, the user can indicate his email for a response - a link to the research result will be sent there. The same link will appear on the page that opens after downloading.

How to use the VirusDetector service:

Download, unzip and run the AVZ anti-virus utility with administrator rights.
Open the “File” menu => “Standard scripts” and execute “Script for collecting PC express analysis files” number 8.

Upload quarantine to the server. It is located in the LOG folder, which is in the same directory as AVZ.

Check after 20-30 minutes Mailbox. After approximately this time, the analysis will be completed and the results will be ready. They are displayed in a table with detailed information about each file. VirusDetector does not give advice on “treatment”; for this, it suggests contacting the resource’s consultants.

Strengths of VirusDetector:

In-depth professional analysis of suspicious files.
Detailed information about each inspected object.
No need to register for the service.

Flaws:

High difficulty of use.

Check files online

The way file scanning services work without installing an antivirus is as follows: the user uploads a suspicious object to the website, where it is scanned by several dozen antivirus engines. Based on the result of the check, you can make a conclusion about the danger or safety of the file.

- the most famous site for this purpose. Checks files up to 128 mb, downloaded both from a PC and from the Internet. Can scan entire web pages for infection. The final result of the check is summarized in a table. In addition, the site displays information about the file’s reputation and data on its internal structure.

Can find information about previously scanned objects by checksum, URL or IP addresses.

- another service that works without downloading. Checks files up to 20 mb in size and quarantine archives of up to 20 objects. It has the same set of antivirus engines as Virustotal.

Jotti

Jotti uses half as many antivirus programs as the previous two services. Checks up to five files simultaneously if their size does not exceed 50 mb. Can find data from previously verified objects using hash sums.

- an English-language service similar to the previous ones for checking the purity of files. Differs the most high speed scanning.

The service is designed to search for malware among browser extensions, plugins, scripts and applications. Finds not only malicious code, but also vulnerabilities through which unwanted software is installed on a computer.

Now let’s answer the most exciting question: are online scanners capable of replacing an antivirus? No. Comprehensive antivirus protection they cannot provide this, since they are “trained” only to detect, but not to repel malware attacks.