Once downloaded, to then install them you need go to Control panel,> system>, hardware, >Device manager - once there click on the appropriate item (Sound,video,game controllers - whichever is your sound driver) and use the "update driver option - you will need save your drivers once they have been unzipped) and when asked which drivers you want to update - select the file into which you have unzipped (or downloaded) the drivers (for ease it may be worthwhile making a new file called "sound driver" or something) and should then do it for you - hope this makes sense?