Diire,
The machine is a Dell Dimension E510 desktop. I considered using the CD that came with my daughters laptop but wasn't clear whether or not I would have to supply the OEM product key and cause a conflict with the Windows installlation on the PC. Does a OS repair ask for the product key? I had thought about taking the HDD out and putting it in a machine at work, going to the file and correcting it but that would be 2 weeks away (sigh) due to vacation... but what the heck, give me a chance to get away from the problem for awhile.

How involved is the OS repair?
TIA,
Robert