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

Removing the infection
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.

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% realiable 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.

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.

List of known worms
Disinfection process in detail
By default, avast! Virus Cleaner does all the work automatically. When you start it and press the "Start scanning" button, the following will be done:
The operating system memory will be scanned, and if any known worm is found, the worm process is terminated - thus avoiding further spreading. If it is not possible to terminate the worm process (it could happen e.g. with Nimda worm that uses a fake library to run inside other processes), the worm will be deactivated in memory to stop its spreading.
Your local hard disks will be scanned.
The "startup items" (such as the system registry, Startup Folder(s), etc.) will be scanned. References to worms found in memory or on disk will be removed or fixed.
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.
avast! Virus Cleaner is currently (in version 1.0.209) 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)


Infected files, identified in point 2, will be removed or fixed (as needed).
Additional working/temporary files created by the identified worms will be removed.
If restarting the computer is needed to finish the disinfection process (e.g. when a file could not be removed because it was currently in use, or if the deactivated worm process is still present), the user is notified and asked whether the restart should be done immediately.
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