While I was working for PC world as a temp mobile tech (dont laugh) I came across this problem about 3 times, the ahem "official fix" was to do a system restore back to factory settings using the recovery CD, Now Im not sure what caused this error, maybe some software or even spyware, but restoring the PC did fix the problem. But you will loose everything you have put on the PC since you got it. so back up everything you want to keep. im pretty sure that both the CD drives had yellow exclamation marks next to them when looking in device manager. maybe its caused by a windows update. so you could try rolling back your PC to an earlier time first before doing the full factory restore.