I use Windows XP Media Center Edition, SP 2. I've gone through my program files to get rid of anything suspicious, and I've had McAfee run it's scheduled scans now and then (There are a total of 20 quarantined files since this computer was reformatted about a month ago). However, the 2nd time I heard this sound occurred 5 minutes ago when I turned the computer on.
What is this sound I'm hearing? Is it a virus? Is it harmless? What can I do to get rid of it?