How to do a full computer scan for viruses. We check the computer for viruses without antivirus by regular means of the system

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

• System scanners check the entire contents of the computer's disks or only selected areas for the presence of malware.
• File scanners check "for cleanliness" individual files, specified by the user.
• Spyware/adware detection tools are "sharpened" to detect threats of this type only.

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 ads), which are not viruses in fact. And advertising search tools - to respond 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 finders need to download a scanning module that uses cloud-based scanning technology. The loaded module transfers data about files from the client machine to the server and receives a response from it whether the files pose a threat.
• They weigh little, as they do not have their own virus databases.
• Cannot run standalone. An internet connection is required for any online scanner to work.
• They do not have algorithms for "treatment" and removal of infected objects (with rare exceptions).
• They do not have system security features.

is a simple, easy and fast online scanner that can check the system for active threats in a couple of minutes for free, as well as assess the state of computer protection - whether an antivirus program is installed, whether a firewall is enabled. After each check, generates a security report. With constant use, it can run on schedule.

McAfee security scan plus- decent tool in addition to McAffee's comprehensive antivirus product, which is already available for money. It does not have malware removal functions - it only notifies about the detection of threats, and it does not always report which ones.

Advantages:

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

Flaws:

• Focused on McAfeeTotal Protection antivirus users, trying to persuade the rest to buy it.
• Does not remove detected malware.
• It does not always report which object (file, website) it considers dangerous. Clicking on the "Fix Now" button redirects to the purchase page for the developer's main product.

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

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

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

• Function of quarantine and deletion of files.
• "Kill all process" - a tool for terminating all processes (it makes it possible to unload an active malicious program from memory if it cannot be done otherwise).
• "Unlock files" - the function of unlocking files.
• "Send files to Panda" - sending suspicious files for analysis to the Panda virus laboratory.

Pros of Panda Cloud Cleaner:

• rich enough for free program functionality.
• Availability of treatment tools.
• Lack of binding to the main product of the developer - Panda Internet Security.

Flaws:

• Relatively low speed checks.
• Lack of Russian

— free product one of the world's most popular developers antivirus solutions— BitDefender S.R.L. Installed as a browser extension through which the download page was opened. It is launched by pressing 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 "cure" 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 gently offered to use Bitdefender Internet Security for free for 6 months.

Benefits of Bitdefender QuickScan:

• The 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 not be clear whether the service performs its tasks at all - the scanning is so fast.

Emsisoft MalAware is another free cloud virus scanner, which works without installation on a computer. Launches immediately after loading. Like most of these services, it only performs quick scan autostart areas and active processes. For a deeper check and "treatment" (if necessary), it offers to download another paid product Emsisoft AntiMalware.

The 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 for promotion paid products developer.

- free online service"domestic style", developed by Kaspersky Lab and the well-known 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 a quarantine to the service, the user can specify his email for a response - a link to the result of the study 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 antivirus utility with administrator rights.
• Open the menu "File" => "Standard scripts" and execute the "Script for collecting PC express analysis files" at number 8.

• Upload the 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 about 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 it, it suggests contacting resource consultants.

Strengths of VirusDetector:

• Deep professional analysis of suspicious files.
• Detailed information about each checked object.
• No need to register for the service.

Flaws:

• High complexity of use.

Checking files online

The work of file checking services without installing an antivirus is as follows: the user uploads a suspicious object to the site, where it is scanned by several dozen antivirus engines. Based on the result of the check, it is possible to draw a conclusion about the danger or safety of the file.

- the most famous site of this purpose. Checks files up to 128 mb, downloaded both from a PC and from the Internet. It can scan entire web pages for infection. The final result of the check is summarized in a table. In addition to it, the site displays information about the reputation of the file 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. Scans files up to 20 mb in size and quarantine archives containing up to 20 objects. It has the same set of antivirus engines as Virustotal.

Jotti

Jotti uses half the number of antiviruses than the previous two services. Checks up to five files at the same time if their size does not exceed 50 mb. Can find data of previously checked objects by hash sums.

- similar to the previous English-language service for checking the cleanliness of files. Distinguished by the most high speed scanning.

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

And now let's answer the most exciting question: are online scanners capable of replacing antivirus? No. Integrated antivirus protection they cannot provide, as they are “trained” only to detect, but not to repel malware attacks.

Hello dear readers! With you Ekaterina Kalmykova. Most people are faced with the problem of foreign programs penetrating their computer, which, one way or another, interfere with normal operation.

Moreover, sometimes these very programs completely kill the operating system, in which case you lose your computer for at least a few days.

In such a situation, we simply cannot do without the help of professionals who will help to “cure” and protect our device from foreign objects. You can also try to find out what is the reason and fix it yourself, but this will take time. Agree, which not everyone has.

Therefore, in order to prevent this, it is necessary to periodically check your computer for any malware.

I think this topic is very relevant especially for people working through the Internet and certainly for bloggers. Therefore, today we will talk about how to check a computer for viruses online for free.

Why do you need to check

This question can only be asked by beginners. After all, more advanced users have probably already encountered the problem virus attack. Therefore, they take this issue more seriously, and often, with the purchase of their electronic assistant, they immediately purchase an anti-virus program that helps prevent damage.

But I will still answer the question: “Why?”

Let's imagine that a computer system is a kind of organism and how all organisms can be subject to various illnesses and diseases. What do we do when our body gets sick? That's right, let's start healing. And for this you need to find the cause and prescribe the right medicine.

So with computer organism the same thing: if signs of a disease are found, it is necessary to determine this disease by checking the PC and cure it.

Reasons for checking a PC:

1. Minimize the risk of failure software. Many viruses force you to reinstall or even buy new software.
2. So that you can, firstly, use the Internet normally, and secondly, work with search engine and the browser you want.
3. Protect all information on your computer from being infected by malicious code.

In general, malware viruses can destroy files or folders that are important to you, thereby causing great harm to your work and knocking you out of working mode for a long time.

I think there are enough reasons to start following this closely.

Verification methods

Exist different ways computer checks: free, paid, online, with and without installing the program, etc.

There are anti-virus programs, the action of which is aimed at warning about the danger of infection with malware and various viruses and neutralizing them. The most common are Kaspersky, Dr. Web, ESET Nod32, Norton, etc.

Well, let's take a closer look at them.

Paid way:

You can buy anti-virus software either in a store or online and install it on your computer. There are many different companies to protect you, such as:

1. Kaspersky Internet security

Perhaps the most famous player in our market, which is able to protect your computer from various malicious threats and is able to remove many viruses. I remember that it appeared when the first computers were just launched.

What are its advantages?

1. Reliability. According to many users, one of the most reliable systems for protecting the operating system.

2. Constant update. It has a constantly updated database, so you can be sure that you are protected from new malicious files.

3. Efficiency. Malicious objects appear in the registry much earlier than other similar antiviruses.

2. Dr. Web

It is also a fairly reliable assistant.

What are the advantages of this antivirus?

1. Has a wide updated registry of virus programs

2. Blocks only those specific files that are infected

3.Understandable and easy to operate

There are other programs, but these are perhaps one of the most popular, and most often downloaded and purchased.

Please note: before deciding on your choice of an antivirus that suits you, be sure to read system requirements and reviews of other users who have used this program.

Free ways:

They are divided into 2 types: either you download pirated versions the above programs, what do we do do not recommend, because the vulnerability of your computer increases, or check through online services.

Let's talk more specifically about online services for software verification.

Online - services for free verification

Now a lot of services provide the service of checking your computer. What are the advantages of such an opportunity?

1. No conflict between installed antivirus and software. That is, you can simply upload any file you want to check, and it will not cause any inconvenience.
2. Saving time. Your computer will not slow down, you will not need to restart.
3. Speed ​​and quickness. No need to register anywhere, just go to the site and that's it.

But this method also has its drawbacks:

1. You will not be able to fully check, it is possible to download only one file and scan it.
2. You may need to download some program on your computer, as it will need access to the file or folder you want to check.

As we can see, there are both advantages and disadvantages. Therefore, whether to use this method of verification is up to you. So, I will talk about some services so that you know where to find them and how to work in them:

1. virustotal- a service that allows you to check files and sites for viruses and malware(trojans, worms, etc.) without additional software downloads.

After checking, a window with its results will open. As you can see, there are no viruses on our blog.

2. BitDefender- The most common online antivirus, which also provides the ability to perform validation.

Click on the Scan now button (in the screenshot, the translation is "Scanning with the enterprise") and you will be prompted to install the BitDefender extension for your browser.

After installation, the service will access the data on your PC and the check will begin.

3. ESET is a free online scanner that allows you to check the protection of your computer and, if found, destroy malware and viruses.

To get started, click the "Launch ESET Online Scanner" button.

Note: if you are using Internet browser Explorer, the check will start without additional downloading and installation of the program. For other browsers, you will need to download and run a small file.

4. house call- Assistant in the search for spyware.

Before work, you must additionally download and run the utility. After starting, you need to agree to the terms of the agreement and click on Scan Now. Before performing a check, you can choose what you want to check: specific file or the entire computer.

5. Panda ActiveScan- allows you to also conduct an online scan of your computer.

On the main page, you need to click "Scan".

You will be prompted to download additional module, which will allow you to check your PC for malicious files, programs, etc.

Here are a variety of ways you can use to protect your computer. Now you know how to check your PC for viruses online, and you understand that it’s better not to stay without an antivirus, but which method to choose is up to you!

Do not forget to periodically check, because the sooner you identify the "disease", the faster and without serious consequences you will be able to get rid of it and prevent it from spreading to the entire computer organism.

Virus-free work for you!

Bye bye!

Ekaterina Kalmykova

Despite the fact that online antivirus services advertise themselves as tools without the need to download and install, this is not entirely true. One way or another, but the user will have to organize access to files.

This means that you need to install some minimal software on your machine, without which you cannot perform a check. It is they who contact the anti-virus database of their own site. Since it is performed this operation online, then it is conditionally referred to as online verification.

How Malicious Content is Checked

The installation and verification algorithm is not particularly unique and for everyone it consists of the following steps:

• download to home computer minimum necessary files programs needed for communication during the check with the current database;
• installation (installation) of the program;
• computer check;
• results report.

The most famous anti-virus components for online scanning

Kaspersky Security Scan

Ratings for a long time in terms of quality of work, Kaspersky Anti-Virus was the leader. Easy to use and affordable. To test the proposed free utility entitled kaspersky security Scan it must first be downloaded from the official website http://www.kaspersky.ru/ by clicking on the link to the "Free Utilities" tab. A screen will open with complete list all free offers from the Kaspersky lab.

When you click on the Kaspersky Security Scan tab, you will be redirected to the download page.

After saving desired file(be sure to remember the folder where the utility was downloaded) start the installation by "clicking" the file.

Complete complete installation if you are not sure about your knowledge of the settings.

You can refuse to install the Yandex browser, which will be asked to be done in the next dialog box.

Choose a check, it is indicated by arrow 1 in the image.

It will take some time to load the program, within 10 minutes. And then you can start with the check (arrow 2), in each of the subsequent windows by selecting the button corresponding to the task.

The scan report will be presented in the form of a scoreboard, which indicates the number of scanned objects, as well as the number and description of detected threats.

If they were found malicious files, you should click "Search for a solution" and follow the instructions depending on the nature of the detected threats. The fact that the utility itself does not destroy programs that, in its opinion, are malicious, but only points to them, will allow you to manually sort and save the necessary information.

Benefits of Kaspersky Security Scan:

• it is important that the utility does not conflict with programs from other manufacturers that are already running on the tested machine;
• this is a Russian-language program, so users of the ru zone can easily understand it.

The closest colleague of Kaspersky anti-virus, which claims to be the leader in the rating, is BitDefender QuickScan (working link http://quickscan.bitdefender.com/). Abroad is considered the best assistant in the issue of online virus detection. To install it, you need to click on the “Scan now” button on the official website of this anti-virus service.

With your consent, a special extension for the browser in which you work will be installed on your computer. time this process takes much less than installing Kaspersky, and further verification is much shorter. This is because BitDefender QuickScan does not analyze in detail the entire computer system. Only active on this moment threats.

According to user reviews, the program may conflict with existing antivirus programs on the computer or indicate problems in their work. This utility may suit those who are familiar with English language in order to understand additional features, tips, recommendations.

An old friend and assistant of computer scientists - NOD32 antivirus

Another "antivirus" with Russian-language interface- good old NOD32. Or rather, a scanner from ESET. To download from home page company portal (https://www.esetnod32.ru/), you must follow the link "Online Scanner" at the bottom of the screen, as indicated by the arrow in the picture.

You can start downloading after entering Email. Despite the site indicating that registration is not required, you will have to enter your email address otherwise you won't be able to go further.

Virus check is launched by Internet Explorer without additional installation, however, for others, the service will offer to download and install the Smart Installer.

Scanning a computer is not instantaneous, it may take time, its progress and results can be monitored in active window programs.

The advantages of NOD32 include the use heuristic analysis. This means that using the available data from previous scans, the program can calculate previously unknown viruses by analogy with those that have already been detected. Found problematic files will not be deleted if you uncheck the "Delete detected threats" button during configuration.

Panda ActiveScan and HouseCall

Without embedding on the computer, it performs a cloud scan in Internet Explorer (only in it) anti-virus program: Panda ActiveScan (http://www.pandasecurity.com/activescan/index/), which allows you to get rid of viruses without installing a full-fledged product.

Analyze content for free and find spyware and viruses are offered by HouseCall.

After acceptance license agreement, which, by the way, is in English, the ScanNow button will become available and you can start checking the contents of the computer. The setting offers the choice of either a full scan or quick analysis main sectors. HouseCall allows you to treat and remove detected viruses from the computer being scanned.

The program is "delicate": it does not leave changes on the computer, which is its additional plus.

Fans of the popular Microsoft software can use its product: Safety Scanner (http://www.microsoft.com/security/scanner/ru-ru/), designed for a one-time computer scan. The program is valid for 10 days, after which you will have to download the updated version.

How to check files and websites for viruses online

It is easy to check individual files using services such as Dr. Web or VirusTotal. To do this, upload the suspicious file to the site and follow the instructions. This is useful when you need to analyze a small amount of information.

Online scanning of suspicious files and websites for viruses using Dr.Web

The healing utility from Dr.Web is very popular. With its help, you can check all the information on your computer for viruses, malware. Separate files, as well as entire websites, are checked online, which can be done by clicking on the link http://online.drweb.com . Enter the path to the file on your computer, or enter the URL, click on check - and the service will give you a report.

As a result, the service will provide you with a report where, in addition to information about the viruses found, you can find out almost all the statistics of the file.

To check the site for viruses, you first need to go to the appropriate tab, enter the portal address and start the scan.

The site is checked a little longer than the file, in the end you will be presented with a review report. The message "Clean site" indicates that the site is clean, there are no threats.

The VirusTotal.com antivirus service presents VirusTotal Scanner, a program that requires installation on a computer.

The first thing that distributors of a boxed solution call is the ability to check without additional transfer of files to the network. It is enough to write the path to the file in the program window on the computer. The report is similar in form to the one on the VirusTotal website.

As practice shows, using one, even a very understandable and understandable anti-virus program, is at least not effective. According to netizens, best solution- have an "anti-virus" installed for permanent use on the computer, be sure to update it regularly. Plus, periodically, especially if there are suspicions, check your unit additionally using the scanners and utilities described above.

It is important to remember that when choosing anti-virus services, you should only contact trusted sites, better - directly to the Internet representations of anti-virus software developers. Each of them has their own official websites, from where it is easy to download necessary information or program. Producers of anti-virus "freeware" update their databases in a timely manner, keeping them up to date, and sometimes have a fairly wide range of free or shareware services.

You are on this page because:

A) You suspect that your computer has a virus.

b) You are just curious.

In any case, the following information will be useful to you.

I won't tell you what to set to normal, paid antivirus, like "Kaspersky", because I suspect that you are "strangled by a toad." So I better tell how to scan your computer for viruses without harm to your wallet, that is, for free.

I like to lay out everything point by point, so I will do it now - I will describe ways scan your computer for viruses by increasing the complexity of the execution of this scan, although one can catch a slight dependence: what harder way, the more reliable it is, although in some cases this rule does not apply. So let's go:

1) The first way is the easiest. Checking your computer for viruses standard means Windows (you have Windows installed, don't you...). But there is one caveat in this method - as far as I remember, Windows Defender is only available in Windows 7 (and maybe Vista, but who has Vista installed now ...), but I don’t know about XP, because I have “Seven” installed, but I don’t want to install XP for myself, just to check this detail ... By the way, according to some reports, more than half of users have Windows 7 installed.

So, let's go: Start, write in the search bar: " Windows Defender" and click, oddly enough: "Windows Defender". IN top panel click "Check" and that's it, Defender scans your computer for spyware and potentially dangerous programs. Well, of course, it’s too early to calm down, because this method is far from the most reliable, and is there such a method at all ... Probably not.

2) So, now we will use anti-virus utilities:

Dr.Web CureIt curing utility

Kaspersky Virus Removal Tool 2011

AVZ antivirus utility

It is better to scan your computer for viruses not with one utility, but with several. Preferably all three.

Now, after completing this item, you can begin to think that your computer is currently more or less clean. However, this is also not the most The best way, because you will not scan your computer for viruses every day with these utilities. Therefore, we will consider the third option.

3) Installing a full antivirus. Yes, this is the best option as your computer will be scanned all the time. I will probably advise you ESET Smart security.

Why not Kaspersky:

a) Kaspersky Anti-Virus heavily loads the system.

b) To ESET smart security easier to find keys. In my opinion, ESET Smart Security is a bit more convenient.

You will probably be indignant, they say, he said everything for free, but here he is talking about paid anti-virus programs. So here is the instruction for tea ... for beginners:

1) For Kaspersky: Go to Google, write: "Keys for Kaspersky".

2) For ESET Smart Security: Go to Google, write: "Keys for Eset".

By the way, when you install an antivirus for yourself, then when you try to go to a site that is objectionable to the firewall, you may stumble upon a polite ban antivirus program. Something like:

Access is denied! The page is in the list of websites with potentially dangerous content.

But here's your salvation: we go to any anonymizer, for example - Chameleon and through it we calmly go to the desired site.

By the way, in Lately I observe a pattern. People are increasingly writing in the search engine - " scan for viruses online”, i.e. without doing anything, but just by clicking on a button somewhere on the site. This is not entirely correct, because this way no one will check your computer for viruses. All you can do is scan one file for viruses.

For example, some file in startup seems suspicious to you. That's when you can go to a site such as Virustotal.com and see what various antivirus programs "think" about this file.

Or, another of these services, for example - Online check with Dr.Web antivirus

OK it's all over Now. I wish you a "clean" computer.

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P.S. - Found it in my opinion, tin. Cooler than in Moscow.

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If the antivirus installed on your computer does not detect anything suspicious, but there are symptoms (freezes, incomprehensible running processes, appearing autorun.inf on flash drives, etc.), a "one-time antivirus" is necessary. It is easy to handle it - just download the link and run it. At the same time, it is advisable to disable the antivirus, which is installed on a permanent basis, for the duration of the scan.

Advantages of disposable antiviruses

1. Free. For home use Almost all disposable antiviruses are free.

Flaws

1. They are not able to protect your computer all the time (there is no module for permanent protection) and no update 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 disposable antivirus. Knows how to deal with running viruses (does not allow himself to be killed during a scan).

HerdProtect

An online antivirus that scans all computer files with 68 antivirus databases. How to use it, told in a separate article

This a good option if unlimited internet is connected.

Minus: does not know how to disinfect infected files.

Plus: You don't need to redownload 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 is in English, but simple.

Checks hard disks very fast. Requires an internet connection, as well as Eset Online scanner.

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

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

AVZ or Zaitsev Antivirus

Powerful antivirus utility (not a full antivirus!) for advanced users. Functions are not the sea, but the whole ocean.

Supports updating anti-virus databases from the Internet. Unlike disposable antiviruses, cannot cure infected *. .exe files. It is rather an "anti-spyware" with many unique additional features. I will quote the words of the author of AVZ: “ The utility is a direct analogue Trojans Hunter and LavaSoft Ad-aware 6. The primary task of the program is adware removal, SpyWare and Trojans.» In the archive with the program there is a help on all functions, it must be carefully read before the first launch.