I have cloned the NT installation I was using in an old Pentium Pro machine and installed the cloned drive in a Celeron 700MHz system. I tested the clone drive in the Pentium Pro to check it was working. It booted up to a desktop perfectly, so I know the boot sector has been set up in the cloned copy. Unfortunately it will not boot in the Celeron computer. I have just done a repair install from the NT CD, but the system still doesn't boot. At the moment the BIOS screen has stopped at "Verifying DMI Pool Data ..........". I have tried the repair-install twice, but still no boot. Is there a system file that needs to be updated or altered to allow the drive to boot on this PC?

disk controllers were not standard in that vintage and as such drive geometry isn't always the same. You might be better off with a new nt install and a restore from backup.

OK thanks. I made another clone from the same source drive, and this one booted as far as the blue screen, but then it stopped with a HALL.DLL error. I have since discovered this means my NT installation won't boot on a single CPU system as it was meant for my old dual CPU Pentium Pro computer. I'll try it sometime soon on a dual Pentium III.