I'm helping a grandson install the Win7 Enterprise free 90 day eval version on his tower from a DVD I burned and have used successfully before on my PC, so it's burned just fine. His homebrew PC (2.66GHz Core 2 Duo/4G/750G HD) originally ran Win7 Home Premium from a disc that came with a Dell laptop. I know this is not supposed to work, but it ran fine for 3-4 months, then slowly fell apart and would not boot. So.....we are basically trying to do a fresh install on a dead machine that won't boot. The problem is that when the install process reaches the point where it pauses and says to "remove the disc and restart the machine then continue the installation", it simply starts back at the very beginning of the process. I've tried several times with the same results. The message that appears is a little vague, just saying to remove the disc and restart the PC. but the restart stalls since there is no bootable OS and asks for a DVD to be placed in the drive. On doing that, it continues after booting from the optical drive but seems to think that we are back at the very beginning of the whole process, and this repeats over and over. I did not have this problem myself installing on a fresh partition on my PC. Suggestions?