I Installed Windows 2000 upgrade professional over Windows NT. Everything worked fine for about 5 days. All of the sudden I get a inaccessible boot device error. I wanted to try and reinstall Windows, but I cant get the machine to boot off the CD drive. I took out the hard drive and reinstalled Windows with another machine. Put the hard drive back in, and same problem. Now I’m at my wits end....cant figure out what to do....any suggestions?