jinx and I had this issue with our desktop. mbpark (who we STILL owe cookies to) recommended the ultimate bootcd. As I understand it, it boots to a faux windows environment, and lets you run antivirus and malware apps without the indigenous windows OS that the virus is hiding in. you build this disc, boot to it, and run the avg and malware, and it scrubs the gunk off your schmizzle.
i mailed a boot cd to bruce today. he says he's gonna get a new windows 7 system cuz he's due anyway....but, for those of you that have had this issue.....try the
ultimate boot cd cure. it worked for us.