I've NEVER seen "R for repair" work, even WITH the recovery disk.
If the power supply has been erratic, it could have messed up the data on the hard disk.
I'd say try to boot off a system CD or floppy, and then see if you can read the hard disk. Does the drive make bad noises (clunk, buzz, knock-knock, etc.) ?
WINDOWS sucks, magical recoveries are rare.