for everyone out here
try this
download IHAVETHEPASSWORD
it's a free image of windows XP which you will need to burn on a DVD
then you can boot from that dvd and you will have a modified version of windows XP running from that disc
on that disc are multiple programs, anti virusses, anti spywares, and a lot more!
most virusses hide themself when you boot your OS but because the OS is booted from the Disc there is no way to let the virus hide himself from the virusscanners
i'm using this way to check for failures on pc's on almost all my customers pc's
try it