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avast! Virus Cleaner is the perfect tool to remove viruses from your computer in case this gets infected. This utility can help you in order to avoid the additional fixes in your system registry and completely remove a virus from your PC.

avast! Virus Cleaner is available free for every user. This tool will help you remove selected worm infections from your computer.

If, despite all the security measures you take, your computer gets infected by a virus or worm, it is necessary to disinfect your system somehow. While for some viruses the only 100% reliable method of disinfection is restoring your system from backups, for many common infections this is not really necessary and the virus/worm can be removed quite easily.

The worms often schedule themselves to be run automatically when you start your operating system; some of them even register themselves to be run when any other application is started. Removing such a worm is not as simple as deleting it - when you just delete the worm file, your operating system might not be able to start your applications (such as Explorer) any more.
So, in order to properly remove the worm from your computer, it is often necessary to make additional fixes in your system registry, delete the links from your Startup Folder etc. Here the avast! Virus Cleaner comes - it will find and remove selected worms from your computer, as well as fix the registry and startup items to make sure your system will work correctly after the disinfection.

Many worms - when activated - create additional working files on your hard disk. Even though these files alone are harmless, they are useless and they should not be there. When avast! Virus Cleaner detects and removes a known worm from your computer, its working/temporary files are removed as well. The same applies for worm-specific registry entries etc.

Important notes
- During the scanning process, it is highly recommended not to start any applications. As already pointed out, some worms will start automatically when any other application is started. Running worm processes are terminated/deactivated only during the first phase of the avast! Virus Cleaner scanning; if you activate the worm again in the middle of the scanning process (by starting another application, such as Notepad, Explorer, ...), the worm will probably not be removed from your computer!
-Turn off any resident (on-access) antivirus protection before running avast! Virus Cleaner. avast! Virus Cleaner has to access the infected files to be able to identify and remove them. The resident protection, however, might not permit it - and the worm could not be removed from your computer! Do not forget to activate the resident protection again after avast! Virus Cleaner has finished the disinfection.
- avast! Virus Cleaner should be used in case you know or suspect that your computer is infected. It is not meant as an antivirus solution for everyday use! Use e.g. avast! 4 Home/Professional to protect your computer.
- To work correctly, the Cleaner requires administrator privileges when running on Windows NT/2000/XP/2003 operating systems. On an infected computer, however, it might not be wise to log in as a privileged user (administrator) - it may help the worm to spread even further. Therefore, you can start avast! Cleaner as a restricted user and enter the administrator login name and password directly into an avast! Virus Cleaner dialog; in such a case, the Cleaner will be run with the privileged user access rights - however, the privileged user will not be actually logged on, and none of his/her startup files will be processed.

avast! Virus Cleaner is currently (in version 1.0.211) able to identify and remove the following worm families:
- Win32:Badtrans [Wrm]
- Win32:Beagle [Wrm] (aka Bagle), variants A-Z, AA-AH
- Win32:Blaster [Wrm] (aka Lovsan), variants A-I
- Win32:BugBear [Wrm], including B-I variants
- Win32:Ganda [Wrm]
- Win32:Klez [Wrm], all variants (including variants of Win32:Elkern)
- Win32:MiMail [Wrm], variants A, C, E, I-N, Q, S-V
- Win32:Mydoom [Wrm] (variants A, B, D, F-N - including the trojan horse)
- Win32:Nachi [Wrm] (aka Welchia, variants A-L)
- Win32:NetSky [Wrm] (aka Moodown, variants A-Z, AA-AD)
- Win32:Nimda [Wrm]
- Win32:Opas [Wrm] (aka Opasoft, Opaserv)
- Win32:Parite (aka Pinfi), variants A-C
- Win32:Sasser [Wrm] (variants A-G)
- Win32:Scold [Wrm]
- Win32:Sircam [Wrm]
- Win32:Sober [Wrm], variants A-I, J-K
- Win32:Sobig [Wrm], including variants B-F
- Win32:Swen [Wrm], including UPX-packed variants
- Win32:Tenga
- Win32:Yaha [Wrm] (aka Lentin), all variants
- Win32:Zafi [Wrm] (variants A-D)

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