Win32:Evo-gen (Susp) avast detecting in windows drivers and system restore?

Today i am getting avast free version 8 latest detecting Win32:Evo-gen (Susp)?,now in virus chest firstly detected in system32 drivers now in system volume restore which is weird because it says last changed 2005?,i have reformatted my pc after this date xp home,any ideas help on this?.

Cheers

false positives and virus problems should be posted in the virus and worms forum section

Thanks.

I have answered your other topic http://forum.avast.com/index.php?topic=120966.msg926034#msg926034.