avast! Virus Cleaner is a free tool that will help you remove selected worm infections from your computer.

avast! Virus Cleaner is currently able to identify and remove the following worm families:

Win32:Badtrans [Wrm]
Win32:Beagle [Wrm] (aka Bagle), variants A-K
Win32:Blaster [Wrm] (aka Lovsan), variants A-M
Win32:BugBear [Wrm], including B variant
Win32:Ganda [Wrm]
Win32:Klez [Wrm], all variants (including variants of Win32:Elkern)
Win32:MiMail [Wrm], variants A, C, E, I-N, Q, S-U
Win32:Mydoom [Wrm] (variants A, B, D, F-H - including the trojan horse)
Win32:Nachi [Wrm] (aka Welchia, variants A-G)
Win32:NetSky [Wrm] (aka Moodown, variants A-O)
Win32:Nimda [Wrm]
Win32:Opas [Wrm] (aka Opasoft, Opaserv)
Win32:Scold [Wrm]
Win32:Sircam [Wrm]
Win32:Sober [Wrm], variants A-D
Win32:Sobig [Wrm], including variants B-F
Win32:Swen [Wrm], including UPX-packed variants
Win32:Yaha [Wrm] (aka Lentin), all variants