I have an old Dell Dimension 3000 (Cely 3.0Ghz, 1Gb PC3200, WinXP) that is being used for basic browsing, emails, etc. There is a problem with the sound - when the computer starts up or music is played the sound works but is very slow (half speed) and jittery. I've downloaded the latest driver from Dell but to no avail. Sound is AD SoundMax Digital Audio.

Any suggestions?