I am usinh windows XP on a P-IV. From the past few days I am facing a strange type of a problem. Many times it has happened that when I am working suddenly some tune starts playing and my mouse pointer cant move. the only option i am left with is to restart my PC. and when i do so i still can hear that tune. From whatever i know about PC's during the reboot phase only the system processes concerned with the reboot should be executed and so no such tune should be played. Is my computer infected with some strange virus??? Please HELP me out!!!!!!

Is the tone coming from your speakers or your system?

I tried to put off the speakers but still it continued. So I believe it is coming from the system.

See if this helps

http://www.computerhope.com/issues/ch000232.htm