I was trying to fix one problem, and it seems I've created a worse one...
The original problem was that the Windows 7 boot manager had gotten installed on a different drive (M: ) than the main installation drive (C: ), and I wanted to move it from M: to C: .
One posted fix involved, among other things, declaring C: to be Active and M: not to be active anymore. Getting C: to be Active was not so hard. Getting M: to be inactive involved diskpart.
Both C: and M: are in the BIOS, and I moved C: to come before M:. This change in itself was not a problem -- I could still boot at this point (but it was still from M: ).
Since the diskpart change, I can't boot at all. I've tried booting from my rescue CD (Award 6.00PG BIOS), and I get as far as "Booting from CD/DVD: Press any key to continue". Whether I do or not, I next get to "Windows Boot Manager: Windows failed to start..." The keyboard is dead at this point. Since it's the WINDOWS Boot Manager, something must get read either from the CD or from the C: hard disk. The file with the problem is stated as /Boot/BCD.
It's not clear to me whether the diskpart caused a problem with the rescue -- I guess not. But at any rate, my simple problem now is: How to I boot from the rescue CD?
I've tried rescue CDs made at two different Windows 7 computers, and also the original Windows 7 (upgrade) installation DVD.