any way the virus for run time error called Win32/Sality its auto copying it self on every exe and destroy it
if u didn`t reinstalled your windows and the anti virus b4 any thing even b4 the pc drivers your svchost maybe will get infected and you will be forced to reinstall windows
look follow this instructions to remove it
1-reinstall windows
2-go on windows only setup lan driver (if its included don`t install any thing i mean built it on the motherborad)
3-after the setup finished restart immediately (most important 1 cause the virus will work again if u didn`t restarted !!)
4-go on safe mode with networking
5-update your anti virus
6-scan whole pc for infected files(it will detect from 1000-2000 virus don`t worry about that
)
recommended tools
1-Win.Xp Pro sp2 (and service pack 3 in your hard disk i mean you can upgrade your windows with it)
2-Microsoft Security Essentials (new anti virus but its really powerful !!)
do the steps up
then if you tired to upade the microsoft anti virus and it says failed just keep pressing ok then pressing update again (it happened to me alot b4)
have fun with non-infected pc