oh , right click "my computer" and click "properties", goto hardware-->driver signing , should be set to "warn" and the box under "administrator option" should be checked , click "ok" and again.. , if that wont work and your running xp pro goto start-->run-->gpedit.msc , under "user configuration" expand "administrator templates" then goto "system" and double click "code signing for device drivers" set to "disabled" and click "ok"
if none of the of em worked , then try this driver
http://www.viaarena.com/Driver/S3G_P...xp_v139433.zip
and if from some reason it wont install aswell , try this one
ftp://ftp.fica.com/Mirror/FICT/mothe...66/WIN2KXP.zip