I recently installed windows 2000 professional on an older computer, with a pentium processor. It originally was made for windows 95, but when i received it, it was upgraded to windows 98 second edition. During upgrading to windows 2000, there were a series of errors that occurred, however, apparently the set up was successful. Now when i try to reboot, it gets to the windows professional screen and freezes or shuts down on its own. I tried going to safe mode but it does not boot, I also tried going to ms-dos mode, but to no avail. I also tried using the start-up disk...same deal. HELP!