last year i had a virus and restarted my windows xp. after i saw that the sound didnt work i opened an audio file and windows media said "windows media player cannot play the file cause there is a problem with ur sound device" i went on this site asked why and then some guy told me to download this file wich should fix it and i downloaded it and while installing it said error and just stopped. i know that i have an sis 712. i dont care i just wanna fix my soundcard. i havent had sound for almost a year now. and i havent bought a new soundcard cause i havent had the money and i still dont. so someone please give me an answer. how do i fix it?