I use Norton, and I've scanned the hard drive, and Norton didn't pick up anything. Yes, that I know of. I wonder what happened to the sound. This is really annoying.
Go to your control panel and troubleshoot (then shoot the teenager) and see if that helps.
Yesterday, I made my weekly visit to TrendMico for the free housecall scan which revealed 26 virii which it could not clean. Then I fired up the BitDefender and ran it: it showed the 26 plus 2 more...after running it twice, the machine "appears" to be squeaky clean once more.
Did you check the connections?