Sality Virus?

[Gaahl]

Download Avast!, which is a free virus scanner which works really good. Then, download Spybot: Search & Destroy, which is a spyware scanner. Download ProcessScanner and check your background processes to see if the virus is there under a process name, then make a complete analysis with Spybot S&D and Avast!. If all of this doesn't work, try a bootup analysis with Avast!; if that doesn't work either, format try searching for possible solutions on Google, you might pop in a site which solved that problem already and gives you a tutorial.