My old PC had the exact same issue. Its the dual-core AMD. You need to find some kind of runtime drivers and it doesn't happen anymore.
http://www.project1999.org/forums/showthread.php?t=3609
Did you try running WinEQ2? Its not what I did to fix it in the past, but it might work as well.
Found the fix I used way back when.
http://support.amd.com/us/Pages/dyna...42f&ItemID=153
Try that. It should fix it right up.