well my experience with Repair is not a very good one. I managed to somehow delete something in Device Manager, and it would not start windows. So I popped in the Windows XP CD, and asked it to Repair. Repair all done. I restart, wow, i am amazed, all my files are here!
But wait, my page file is gone! and i couldn't seem to set it or do anything else (no pagefile). I eventually reinstalled windows XP.
I've had the same experiance as you with repair
with me... if i cant get into safemode or last good known bootup thing... then i install 2k or xp on another partition, backup data and format
much cleaner method