My computer just started lagging for reasons unknown. I've defragged, scanned for viruses and spyware, cleaned the registry, and done probably every other thing I could think of. It's taking 40 sec to boot now and even playing MP3s causes it to slow down. Surfing the net and browsing files through Explorer seem to cause no problems however. I noticed a post from someone about a year ago that had a similar problem, but there was no real solutions that were posted. Please help me! If no one can help, I'm gonna end up formatting my drive.