Ok, Have you tried looking into the audio
drivers? were they downloaded from windows update or d/l from the manufacturer's site and up to date for your particular OS (Vista 32-bit for you Cartoonman)... sometimes if the newest
driver acts "quirky" with your system it's best to try an older one, possibly roll back to the previous one before you try d/l-ing from vender's site. try deleting the problematic audio
drivers and rebooting, to allow windows update to install a new one or at least offer one w/optional updates.
Do you remember when it first started happening? a particular period of time or day? check the event logs and installed updates to find a problem install failure of an audio or other conflicting
driver....
You can try to do a system restore point to a time before this point, although you'll have to monitor it if this works because the conflicting
driver may be reinstalled soon enough, once again.
if you have already or soon do rule out the
drivers as a source, then this problem usually leads to a repair or clean install in my experience.
Try to run the system file scanner and see if some system corruption has occurred.
SFC /SCANNOW Command - System File Checker .<---windows 7 version for OP, same command will work in vista though
IF you do figure anything out, I'd appreciate as detailed of a reply as possible, as many people online and my customers have a similar problem in windows 7 mostly (but vista too) Thanks!
Mike