lol,
I know how ya feel, I often lose all sound until the engine statup sound is finished, that radiobar thing is kinda odd, well i could say make sure there are no IRQ conflicts with yer sound card, If you have a CD Writer I would just back up all my games and other important stuff and do a lo-level format and reinstall everything, If you have cable modem or better, just redownload everything, I know this is a most un-appealing cure for the prob but it will probably have to be done, also at least ya will get thist nice new car smell again

if ya reinstall everything and it still does it, i would point finger at M-bord or ram.