Hi... try refreshing your computer's Windows Experience Index . After clicking on the "Re-run Assessment " link, you will be informed of your key system components rate. i had sound delay when i got a 1.0 base score coz windows informed me i should install a higher version video card. i have a 2.5 base score now and i don't have any sound delay anymore. btw, i also am using Vista_Win7_R246 for audio. i can play my guitar through the computer without any delay now... hope this helps!