Check the listing on the following site of things that need cleaning
ContraVirus - from Wiki-Security, the free encyclopedia of computer security
Also check for the "XPuudate" process and files. On the 411 site there is also a mention of some other file names this uses.
After you clean your computer from "contravirus and xpuudate" run a search for both of these using the search files. (also search hidden files) These programs lodge themselves everywhere including in the backup.
Then clean the computer again using Spybot S&D