Scan the system for viruses. Is it worth checking your computer for viruses without installing special programs? Online services for free checking

Since you got here, it means you are looking for the answer to this question: how to check your computer for viruses online? And before answering it, you need to find out some information about the verification system itself. After this, you will even be able to answer your own question. So let's start in order.

How does the scanning system of a regular antivirus that is installed on a computer work? Firstly, the program periodically updates the database of virus signatures, against which it can compare your data with those in the database. That is, if anti-spyware software does not carry out such an update, then the system’s arsenal will not reflect the latest “new” malicious codes released by hackers. It turns out that if your data is captured by a modern virus, such an application will simply be powerless. Then it will be impossible to talk not only about the recovery of your data, but also about the safety of documents, images, music, films and other types of information contained on your personal computer.

Secondly, the antivirus program conducts a deep analysis of files for the presence of similar codes, which lies in its base, which we discussed above. If a match is detected, the system informs the user about infected documents and possible options outcome: treatment, removal and quarantine. This process can take an impressive amount of time - it all depends on the amount of information being checked, the speed of reading and data exchange with the disk (that is, how fast and powerful your computer is).

Now let’s remember how any online service works. For example, any online photo editor allows you to add different effects to your photos or pictures from the Internet on own server. But how to open your image file there? This document is uploaded to the server, after which editing becomes possible. It turns out that online programs cannot get into your computer without your knowledge, especially on a global scale. Then you can ask a leading question: how can an online antivirus access all the data on your computer?

Is it still true?

You were probably able to answer the question posed above in your head. And if not, then let’s explain this interesting point. You can check for viruses using online services, but there is one big “BUT”: the check can only be done using a separate file, which, as in the case of the photo editor from the example, will be uploaded to antivirus server. This may be relevant if you need to check only a few files (for example, from external media).

Let's say you were given documents on a flash card, but you don't have an antivirus on your computer. Then, you can go to the online antivirus and check these files without opening them using network server. Another very important point is that there are extensions for installed browser, which can also conduct checks for malicious code. Or online utilities available for one-time download, after which it is possible to scan your computer for viruses without installation. It can be noticed that network checks there are a lot, so for convenience, we will divide them into categories and consider each of them separately.

Online antiviruses

Here we will talk about the first category, which was mentioned above - these are real online antiviruses that scan separate files or even entire websites for malware software. There are many such servers, so let’s look at the most popular ones.

Virustotal. The site of this antivirus https://www.virustotal.com/ru/ allows you to select a file to upload to the server or insert a link to a site whose contents you would like to check for Trojans, worms and other types of spyware. Then just click the “Check” button and wait for the operation to complete. Upon completion of the scan, a report on the work performed with all the resulting data will be presented.

Dr.Web. The online version of the popular Dr.Web antivirus follows approximately the same principle. You need to go to the website http://online.drweb.com/ and select a file to download, then click on “SCAN!” The difference between Doctor Web and the previous one is that you cannot check sites here. But the virus database may also differ, so to be more convincing, you can use both services.

Browser extension

In this category, the list of products is sharply reduced to one popular representative - BitDefender QuickScan. Judging by the reviews, the BitDefender service is quite good in terms of doing its job. You can open it using the link http://quickscan.bitdefender.com/. What to do next? And then you will need to click on the SCAN NOW button, after which the service will install an extension that gains access to the data on the computer. Only then will the system automatically run a one-minute scan for malware.

It’s a little unclear here: how can you scan all files in such a small amount of time? There may be several explanations: either the program does not work at all (a paradox), or it only checks the names of documents and some system parameters. According to the manufacturer itself, scanning is performed in the cloud, which is why the verification takes little time. This is hard to believe, because why do other companies release whole series of products that can carry out scanning for an impressive amount of time, if BitDefender does it in a minute?

Mini programs

There are also one-time mini-programs (you will find out why mini-programs are below) that allow you to conduct a full online scan of your computer for viruses. Many companies provide them on their websites open access(Kaspersky, ESET and others). You just need to download the file, which runs and then works on the network. The size of this file is very small (usually no more than seven to nine megabytes). Once launched, the application will download the necessary the latest database virus signatures, after which it will scan your computer for viruses without installation: after all, we just opened the downloaded file and did not install anything.

Here it must be said that online does not always mean working in a browser. This is any process of interaction with the network. But when the program doesn’t need access to the network to operate, then it’s something else. Therefore, do not think that this method does not apply to online verification.

Conclusion

Today we talked not only about the possibility of the existence of online antiviruses, but we also became convinced of this. In addition, now you know how an antivirus works and what types of online computer virus scans exist without installation. From now on, you can decide for yourself which option to use. But still, for security, it is recommended to use full-fledged anti-virus utilities that will constantly update the databases and keep your information safe and sound. Share with us and other users in the comments: which method did you like best?

This is far from the only antivirus program presented on modern market software Exists big choice programs of varying quality and pricing policy. Analyze the pros and cons of the presented applications to choose best option- not an easy task even for an experienced user. Our virus scanning and removal program occupies a special place among them for several reasons:

Constant and non-stop monitoring, detection and elimination of virus threats on the hard drive and external media. Checking your computer for viruses is a simple and quick process. Our team used all the resources and developments of in-house programmers, as well as best ideas world experts recent years. Such a union guarantees success.
As for most users, Internet safety is one of our main priorities. We are sure that the user is not obliged to give personal funds to be protected. Therefore, our product is distributed as "freeware". Checking your computer for viruses is absolutely free. No demo versions and trial periods. Everything is real and forever.
Downloading 360 Total Security on our official website, you will not only protect your computer and smartphone from virus threats, but will significantly speed up their operation. The utility has tools to optimize the operation of the device. Cleaning the registry and startup, eliminating useless background processes and startup programs. These actions will have a positive impact on PC performance.
Five engines come to your protection. One of them - 360 Cloud - uses the cloud to process data. This feature significantly reduces the load on CPU and has a positive impact on productivity.
Two computer scan modes. You can quickly scan your PC for viruses, or do a more thorough scan.
Open suspicious files in safe environment Sandbox. Sandboxing potentially limits access dangerous files to the network and internal storage devices.
The pleasant interface does not overload you with useless information and complex terms. The program was created by people and for people. You don't have to understand the complex design of the application. Just a couple of clicks and 360 Total Security works the way you need.

The development of virus software occurs at such a pace that not all antiviruses can cope with it. Therefore, when a user begins to suspect that malware has appeared on his computer, but the installed anti-virus program does not find anything, portable scanners come to the rescue. They do not require installation, so they do not conflict with established protection.

There are many scanners that can easily determine if there is a threat on your system, and some will even clean it of it. unnecessary files. You just need to download the utility you like, configure or download the databases if necessary, run it and wait for the result. If problems are found, the scanner will offer you a solution.

Users also use antivirus utilities when there is no protection on their computer, because it is easier to use a scanner than to forever load the processor with an antivirus program, especially on weak devices. Also, portable utilities convenient, because if you have problems with the installed protection, you can always run a scan and get the result.

Method 1: Dr.Web CureIt

Dr.Web CureIt is free utility from a famous Russian company Dr.Web. This tool capable of treating detected threats or quarantining them.

Method 2: Kaspersky Virus Removal Tool

Kaspersky Virus Removal Tool- a useful and accessible tool for everyone. Of course, it does not provide such protection as, but it copes well with all sorts of malware that it can find.

Method 3: AdwCleaner

AdwCleaner is a lightweight utility that can clean your computer of unwanted plugins, extensions, viruses and more. Can fully check all sections. Free and does not require installation.

Method 4: AVZ

Portable AVZ mode can become very useful tool to remove viruses. In addition to cleaning from malicious programs, AVZ has several useful functions For convenient work with the system.

Knowing a few useful portable scanners, you can always check your computer for virus activity and eliminate it. In addition, some utilities have other useful functions that can always come in handy.

To clean your computer and prevent additional infections, you can do next steps in the order listed below. However, it is important to keep in mind that cleaning or attempting to remove malware from your computer may result in system failure or data loss. Therefore it is recommended to do backup important information before the treatment procedure.

Disconnect from the Internet

Disconnect your computer from the network by unplugging network cable and turning off wireless connection. By disconnecting your computer from the Internet, you prevent the risk of your personal information, will be compromised. This will also reduce or eliminate the risk of your computer being re-infected while you are trying to clean it.

Go to Safe Mode

Once you start your computer, press F8 several times until you get a list of startup options. Select Safe Mode with Networking.

“Safe Mode” option

Go to Control Panel, click "System" and in the "System Restore" section select "Turn off System Restore."

Run your antivirus

IN safe mode run the existing package antivirus programs. Write down the names of the viruses you find. Download an additional scanner such as Malwarebytes (free) on another (virus-free) device and transfer it to your computer. Then do full scan. Restart your computer and check again. Repeat this process until the scanner finds no viruses.
Important note: Never run a scan from your primary and secondary antivirus protection at the same time, since they may interfere with each other's removal process. It is also extremely important to constantly update operating system and an antivirus software package to prevent future infections. Many viruses will not be detected unless you scan in Safe Mode.

Uses CCleaner to clean your computer

Clear temporary files, internet browser history, cache and cookies. These tasks can be performed, for example, using CCleaner. Be careful when cleaning or deleting registry entries, as this can seriously damage your system. Also note that this clears your browser's saved passwords, history and trash, be sure to save anything that might be useful in the future.

Run Windows Updates

Make sure your firewall is enabled and that's it Latest updates for Windows are loaded. It is also worth updating your browsers, Java, Acrobat Reader, Flash and other applications.

Be sure to visit ours, where you will find all the best popular antiviruses at affordable prices.

Video: How to check your computer for viruses online

Unfortunately, it is impossible to check your computer for viruses using just a website opened in a browser. The fact is that for security reasons web services do not have access to local files and programs on PC.

But there are cloud antiviruses that can scan the system without full installation and registration. To use one of them, just download a small client and run it. After this, you can scan your entire computer or select partitions for partial scanning. During the process, the program will download the data it needs from the cloud. If viruses are detected, the service will offer to remove them.

If you want to scan your computer using a cloud antivirus, try these services. All of them are products of well-known companies and work in a similar way - according to the scheme described above. Therefore, you can choose any of them.

Of course, such an online scanner is only suitable for periodic on-demand checks and does not provide permanent protection of your computer from malware And network attacks. Therefore, it is not an equivalent replacement for a paid antivirus.

Perhaps similar services exist for mobile devices, but I won’t recommend them. After all, even Android developers they say that most users do not need antiviruses for this system: it is enough to install programs only from Google Play and be careful with . A iOS system is too closed for viruses to pose a serious threat to the iPad or iPhone.

Web services for checking individual files

If you want to check a small file or an archive of files for viruses, you can do this completely online, without installing any programs at all. You just need to go to any of the resources listed below, download suspicious file from the computer to the server and click on the check button.