Online scanning of the system, files and links for viruses. Curative anti-virus utility from Kaspersky Lab Online virus check Kaspersky

Many computer users with avast installed! Free Antivirus has become a weekly habit; an anti-virus scanner and doctor Kaspersky Virus Removal Tool can be downloaded for free and used for a one-time scan to look for malicious code.

The main functions of an antivirus program include diagnosis and treatment of all, even the newest viruses, worms, rootkits, Trojans and other malicious programs, including spyware or adware. If you urgently need to download a free version of an antivirus for free, it makes sense to download this free Kaspersky antivirus for free.

Disposable antiviruses: download, use and remove

Instead of or together with disposable Doctor Kaspersky, you can use it as an auxiliary and insurance antivirus agent. To do this, just download Kaspersky Virus Removal Tool for free and just run it on your computer. You should not rely only on such utilities, since they do not provide constant reliable protection in real online-offline time. After scanning and disinfection, the computer system can be attacked by malware from outside. The source of the threat can be any carrier or transmitter of information connected to a computer, electronic mail (e-mail), the Internet (www, ftp, torrent) and others. To protect against such threats, there are specialized anti-virus programs, including powerful free anti-virus software, for example, a free anti-virus that is free and easy to install even for a computer “dummie”.

Principles of Kaspersky Virus Removal Tool

The program works the same way as other paid and free Kaspersky antiviruses, both in automatic mode and according to manual settings. Naturally, the automatic mode allows the antivirus program to decide the fate of infected and diseased files according to the built-in algorithms. Malicious, infected and suspicious files are moved to the quarantine zone or deleted. If possible and necessary, treatment is usually prescribed and performed.

For the average user, it is recommended to leave the default settings. Computer gurus and simply curious computer users, if they have free time, can “play around” with the settings. For preventive purposes, it is recommended to perform a weekly scan using the new version of Kaspersky's one-time anti-virus VRTool (AVP Tool). To do this, you need to download Kaspersky Virus Removal Tool for free again. This program with built-in anti-virus databases is updated every day.

Kaspersky's free antivirus can...

Kaspersky Virus Removal Tool checks the computer's RAM and ROM against the latest Kaspersky Lab anti-virus databases using a heuristic probabilistic analyzer. This free antivirus starts safely and works effectively on an infected system, although it is recommended to reboot your computer into “safe mode” and, for greater reliability, start scanning from there.

It is also worth remembering that disposable KasperskyVRT cannot independently update virus databases, since all anti-virus databases are loaded as part of the program. Unlike permanent antiviruses, which are usually independently capable of loading up-to-date virus database signatures, when using a one-time antivirus program, you need to download the free Kaspersky Virus Removal Tool antivirus again. Fortunately, it is always possible to download a free antivirus without registration, and this program is updated daily, or even more often.

If you have permanent desktop antivirus software installed on your PC, such as avast! Free Antivirus, AVG AntiVirus Free or another system antivirus that works constantly, there will be no problems. The anti-virus utility Kaspersky Virus Removal Tool (AVP Tool) does not conflict with the standard anti-virus installed on the computer.

• Letter. Please tell us on your website about, for example, Kaspersky Virus Removal Tool or Kaspersky Security Scan, I think they deserve attention. I just had a dispute with a friend, he tells me that the best anti-virus utility that works without installation on the computer is . I don’t argue, and you often mention it in your articles, it actually finds and neutralizes malware well, but I think the utilities from Kaspersky are no worse than the utilities from Dr.Web. Kaspersky Lab even has a utility called TDSSKiller.exe - it finds and neutralizes malware such as rootkits. There is an article on your website about, but not a word about the above-mentioned utilities. Or you think that they are not effective in fighting viruses. Max.

• Letter No. 2 I downloaded the utility from Kaspersky Kaspersky Security Scan, but it turns out that it does not remove viruses, but simply informs about threats and the security status of your computer. I don’t understand what the point is in using it then. Without a signature.
• Letter No. 3 Admin, help with advice. When scanning the computer for the presence of rootkits using the Kaspersky utility TDSSKiller, it was found suspicious object, medium danger – Service: sptd. The instructions for using the utility say: copy the suspicious object to quarantine and then send the files to Kaspersky Virus Lab or check for viruses on VirusTotal.com. In short, I copied a suspicious file to quarantine and wanted to check it on the VirusTotal.com website, but I can’t find the quarantine itself, there is no information about this anywhere in the program settings, the Kaspersky forum advised me to carefully read the instructions for using the TDSSKiller program, but there is no such information in the instructions either. Without a signature.

Free Kaspersky utilities

In this article we will download and use it in combat conditions free Kaspersky utilities- Kaspersky Virus Removal Tool, Kaspersky Security Scan, and anti-rootkit utility TDSSKiller. Let's get acquainted with the Kaspersky Rescue Disk. How everything works for Kaspersky (and it works), you will see for yourself and draw a conclusion.

Undoubtedly, it is worth carrying anti-virus utilities from Kaspersky on a flash drive and using them as needed in the fight against viruses. I didn’t write anything about these utilities only because I simply don’t have enough time.

All Kaspersky Lab products incorporate the latest developments in the field of antivirus technologies, including new “cloud” technologies. Take, for example, Kaspersky Virus Removal Tool (AVPTool), a constantly updated free antivirus scanner. It should be used from time to time to scan your computer for the presence of malware. By scanning your computer, this utility neutralizes malicious programs located on your computer: Trojans, Internet worms, rootkits, as well as spyware and adware. Kaspersky Virus Removal Tool can be launched in automatic and manual mode.

• But it is important to know that this utility does not provide real-time protection for your computer, that is, Kaspersky Virus Removal Tool will not replace your standard antivirus, but will only help it. Working on your computer, Kaspersky utilities do not conflict with the anti-virus software you have installed.

• Very important note. You should know everything about all the utilities you use so that the situation described in the second letter does not happen. The Kaspersky Security Scan utility does not actually remove viruses, but you still need to use it and now you will see how. We will check the functionality of free Kaspersky utilities on my friend’s computer; when visiting one site that turned out to be malicious, he planted two Trojans for himself - in the Startup folder and the Temp temporary files folder.

All free utilities from Kaspersky can be downloaded on the official page http://www.kaspersky.ru/virusscanner

Kaspersky Virus Removal Tool

Let's start with the Kaspersky Virus Removal Tool utility, analyze all its settings and check our computer for viruses.

the language is Russian and click Download, then download the program installer to our computer and run it.

We agree to the license agreement and click Get to work.

The free utility Kaspersky Virus Removal Tool can be launched in Automatic check, there is also a Manual Treatment mode.

Before you click Run scan, I advise you to go to the program settings. In option Check area, be sure to check My Documents, My Mail and most importantly Disk (C:). Why?

When scanning an infected computer, I did not select Disk (C:) in the settings and the Kaspersky Virus Removal Tool found only one virus in startup,
, but did not find the second malicious program - located in the Temp temporary files folder
. I had to rescan Drive (C:) separately, and only after rescanning was the virus found.
Security level can be left in the middle

Option Action, you can check the box - Prompt when detected.

If the Kaspersky Virus Removal Tool utility detects a virus program on you, it will inform you to Disinfect, (if possible) Delete (recommended) or Skip.

So, let's go, let's press Run scan

The first Trojan program was found after 8 minutes.

The second Trojan, as I already said, was found during a second scan, so do not forget to select drive (C:) for scanning in the program settings. The utility immediately offered to remove the second malicious program.

As for manual treatment. It takes place in three stages. Click Collecting information about the system,

the utility collects the information it needs, which is located in the file avptool_sysinfo.zip

Next, register on the Kaspersky Lab forum in the Anti-Virus thread, ask your question and attach the avptool_sysinfo.zip archive, you should definitely receive an answer, and sometimes specialists may suggest you run a script, which you need to copy into the Execute Script window and click Run Script.

http://support.kaspersky.ru/6182

At the end of the utility, the following proposal is received. If you press the button Install protection, we will immediately be taken to a page with paid antivirus solutions from Kaspersky Lab.

Free utility Kaspersky Security Scan

Let's move on to the second Kaspersky Security Scan utility, we will check the same infected computer with two viruses: in Startup and in the Temp temporary files folder.

The Kaspersky Security Scan utility does not remove viruses, but after scanning your computer it provides detailed information about the threats located in your operating system and where they were found, vulnerabilities and other problems. It all looks like this.
Let's go to the page again http://www.kaspersky.ru/virusscanner, select Kaspersky Security Scan and click Download.

Download and run the utility. Again I want to say that if Quick check you are not satisfied, then choose Full check. In my case, the situation with Quick Scan repeated itself; it found only one virus in Startup.

C:\Users\Username\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup
When performing a full scan, the utility found a second malware in temporary files
C:\Users\Username\AppData\Local\Temp
Over time

The free Kaspersky Security Scan utility will give you this report. Click on the arrow.

What is the state of the anti-virus program on your computer? I got a note because my anti-virus program was disabled at the time the utility was running.
If the utility finds malware, it will give you their location.

Vulnerabilities

Other problems . Provides very important information about vulnerabilities associated with the parameters of programs installed on your computer and the operating system itself. As you can see, the utility correctly noted problems on my computer related to autorun from various media that need to be corrected.

Rescue Disk Kaspersky Rescue Disk

The advantage of checking the operating system from a rescue boot disk over other utilities is that the malware found in the operating system is inoperative, one might say, simply lying on the hard drive.

Select Kaspersky Rescue Disk and click download.

Download the disk image in ISO format, burn it to a disc. Who doesn’t know how to burn an ISO image onto a blank CD or DVD, read our article
So, after we have burned the image onto a blank CD, we boot our computer from the Kaspersky Rescue Disk. Again, for those who don’t know how, read our article
In this window, to continue loading, you need to press any key on the keyboard.

We choose the language Russian, however, who needs which one.

We accept the conditions - press key 1.

Choose Graphic mode.

Wait for the disks to mount.

Here is the desktop of the Kaspersky Rescue Disk antivirus disk. Let's look at the main capabilities of the disk.
Click on Kaspersky Rescue Disk to open a settings window; there is nothing complicated to manage here. In the settings, we additionally mark drive C: for virus scanning, or if you want all drives, but the scan in this case will take a very long time. Click on the button Run check objects.

Kaspersky Rescue Disk has a registry editor, which you will agree is very convenient; by the way, earlier versions of the disk did not have it.

You can also use the File Manager if you need to move your files from one hard drive partition to another.

And using the built-in browser you can access the Internet.

TDSSKiller - protection against rootkits

Well, the turn has come to the TDSSKiller utility, which can help you detect and neutralize rootkits on your computer. A rootkit is a program for hiding the presence of a malicious program in an operating system, helping an attacker to manage a hacked Windows and hide traces of his malicious activities by hiding destructive processes and the rootkit itself.

You can download it on the official website of Kaspersky Lab; by the way, detailed instructions for using the utility are available at this link http://support.kaspersky.ru/5353?el=88446 Click Download the file TDSSKiller.exe

Download and launch.

If the program displays a window indicating that an update is available for download, click on Download update.

By default, the utility is configured optimally and there is no need to change anything. Click Start checking.

If after scanning the program displays the following window - Suspicious object, medium danger - Service: sptd, then this is not scary. Service: sptd is a service of the program - the Daemon tools disk drive emulator. You may ask - How can you determine whether it’s scary or not?

TDSSKiller can detect the following suspicious services or files:
Hidden service – a hidden key in the registry;
Blocked service– inaccessible key in the registry;
Hidden file – a hidden file on the disk is hidden when enumerated in the standard way;
Locked file- the file on the disk cannot be opened in the standard way;
Spoofed file- when reading, the file contents are not real;
Rootkit.Win32.BackBoot.gen - suspected infected MBR boot record.

For detailed analysis, Kaspersky Lab recommends copying detected objects to quarantine by selecting the Copy to quarantine action (the file will not be deleted!!!), then sending the files to Kaspersky Virus Lab or VirusTotal.com scanning.

Quarantine location is the root of the C:\TDSSKiller_Quarantine drive
Open the website VirusTotal.com, then click Select file

Open and Check

Analysis of the sptd.sys file on VirusTotal.com showed that only one antivirus company, TrendMicro, classified the sptd.sys file as a PAK_Generic.009 virus.

At one time, I established that this file is safe, but to be completely sure, our reader can send it to Kaspersky Virus Lab.

Articles on this topic:

Not all users install an antivirus on their computer or laptop. Some people are lazy, others don’t see the need for it. And when suddenly your PC starts behaving strangely (it’s buggy and slow, or advertising appears in the browser), you can simply check your computer for viruses online and for free. Fortunately, there are plenty of options today.

Below are the 7 best antiviruses that can scan for viruses online. True, you won’t be able to check your computer without downloading the installer. Virus scanning is done online, but antiviruses need access to your files. Therefore, some of them are installed as a browser module, and some are installed as a small utility.

Kaspersky Security Scan – a powerful online virus scanner

A full-fledged antivirus is well known in Russia, and its “younger brother” is also popular.

The program runs in the cloud, so you can quickly check Kaspersky for viruses online on any PC or laptop.

Its main advantages:

• does not slow down Windows (which cannot be said about the full-fledged Kaspersky antivirus, which “eats” a lot of resources during scanning);
• does not conflict with other antiviruses installed on the computer;
• does not remove detected viruses, but only reports them (on the one hand, this is a plus, but on the other, you will have to remove them manually);
• issues a detailed report.

1. Download the installer file from this link http://www.kaspersky.ru/free-virus-scan.
2. Launch the program.
3. Wait until the scan is completed.

After this, all you have to do is remove the viruses (if any were found).

BitDefender QuickScan - fast online PC virus scan

Another way to clean your computer from viruses online is by using BitDefender QuickScan. It is considered very effective and enjoys great success abroad. About the same as our Kaspersky.

Cleaning your computer from viruses online is also easy. All you need is:

1. Follow this link http://quickscan.bitdefender.com/.
2. Click on “Scan Now”.
3. Install a browser module through which the antivirus will gain access to your folders and files.
4. Wait until the check is completed.

The main advantage of BitDefender is fast online virus scanning. On average it takes 1-2 minutes. On the one hand, this is cool, but on the other, what will he be able to scan in such a short time?

Most likely, the online scanner checks the main list of the most common threats: system files, startup - i.e. those places where viruses mainly “live”. The developers themselves say that checking your computer for viruses online is carried out in the cloud (on their servers), which is why it is done so quickly.

ESET Online Scanner - effectively scan your computer for viruses

The next method is using a free ESET product from the developers of NOD32. To start checking, follow this link.

It is recommended to scan your PC through Internet Explorer - in this case, the scan will be performed in the browser window. When using Chrome, Firefox or Opera, the user will have to download a small file, and the PC analysis will be performed in a separate program.

After downloading and running the file, you need to set the settings. For example, enable scanning of archives and potentially dangerous programs. You can also clear the checkbox in the “Remove threats” item so that the antivirus does not accidentally erase important files that, in its opinion, are infected. Then click the "Start" button.

ESET Online Scanner will update the database, after which an online scan of your PC for viruses will begin.

• a thorough system scan (takes 40 minutes on average - depends on your Internet speed and HDD capacity);
• detects any threats;
• can detect malware, incl. in the register;
• performs heuristic analysis;
• generates a complete report on the work performed.

Another plus is that the online scanner is automatically deleted after the scan is completed. That is, no files will remain after it.

Thus, ESET antivirus is perhaps one of the best ways to clean your computer from viruses online. Its only drawback is the need for installation.

Panda Cloud Cleaner - online scanning of flash drives for viruses

Users are offered 4 versions to choose from:

• standard;
• portable (does not require installation);
• for scanning USB flash drive;
• in ISO format (emergency boot disk for checking PC viruses that won’t turn on).

Which version to choose, decide for yourself. For example, if you want to check a flash drive for viruses online, then download the third installer on the developers’ website.

Main advantages:

• quick check (on average 20-30 minutes);
• detection of common threats;
• effective online virus cleaning.

As in the previous case, Panda also “self-destructs” after successfully checking and treating viruses. That is, it is automatically deleted and does not leave any files behind.

F-Secure Online Scanner – treatment of viruses and spyware

Another excellent antivirus that can scan your computer for viruses online. To start checking, go to the developers’ website and click on the “Launch” button. After downloading and launching the installer, a new window will open in which scanning of the laptop or PC will begin.

The main advantages of this antivirus:

• quick scanning – takes 10-15 minutes on average;
• effective treatment of viruses and spyware utilities;
• works even with antivirus installed on your PC.

Before starting the scan, it is advisable to turn off “heavy” programs. This will help speed up the scanning process.

VirusTotal

All previous options had one common disadvantage - the need to download the installer. In this case, you can scan your computer for viruses online without installing any programs.

VirusTotal is a service from Google that can scan any files on your PC. It can also scan sites for malicious utilities. Using the service is very simple:

1. Follow this link.
2. Provide the path to the file you want to scan or the URL of any website.
3. Click the "Check" button.

Wait until the check is completed, and then look at the report.

It is not possible to scan all documents on your computer using VirusTotal. It can scan sites and files individually. This option is suitable for those who, for example, have downloaded a program and want to make sure that it does not contain viruses before installing it. For such cases, VirusTotal is best suited, because it does not need to be downloaded.

Dr.Web - effective scanning of files for viruses

And the last way is through Doctor Web. It has an excellent service that allows you to check individual files. For this:

1. Go to this website http://online.drweb.com/.
2. Click Browse and browse to the file you want to scan.
3. Click the “Check!” button.

In this case, you can scan your computer for viruses online without installing Dr. antivirus. Web. But, like VirusTotal, Doctor Web can scan only one file at a time.

A few words in conclusion

This sounds strange, but it is impossible to completely scan a laptop or computer and remove viruses online. The first 5 antiviruses require the installation of a small file. The question arises: isn’t it easier to install a full-fledged version of Kaspersky or BitDefender? They have more features, plus they provide real-time PC protection. In addition, many popular antiviruses have free versions.

The last 2 options are VirusTotal and Dr. Web – do not require installation, but check one file at a time. This is also not entirely convenient.

By the way, a computer or laptop may be infected not with viruses, but with malware. As a result, advertisements appear in the browser, third-party pages of unknown sites open, etc. In this case, antiviruses will not help; special software is required.