Sounds like you have nothing to lose so try an OS repair. Repair leaves your installed programs, data files & settings intact. Boot from the OS CDROM. As I recall, at the first blue data screen you will want to press "Enter" (otherwise pressing "R" there gets you to the Restore Console which is not what you want). In the next (ie, second) blue data screen selecting the "R" option will commence the repair process. It will look formidable, but you'll be fine. I dont do repair often so I dont remember if the CD Key is needed , but be sure to have it ready if needed.