|"the problem is with the desktop"|
Is there some reason why you're not posting the model & model number?
"have recovery disk that just sit in the tray"
You have a hardware problem, not a software problem. Put the recovery disc away before you end up trashing the Windows installation. Have you made any hardware changes that may have brought this on? Did you cahnge anything inside the case? Add or change any external drives, keyboard, mouse, etc? If not, it could be your hard drive has failed. Were there any problems leading up to this?