Well,Disconnecting the drives didn't work, too.I got the correct drive name for the C: drive but windows didn't start.Also all repairs of mbr failed.I guess, next try is a complete reinstall of windows ....
How's he supposed to do this from a DOS prompt if he can't even boot into safe mode? If he hasn't already done so, he should create the Ultimate Boot Disk/Linux disk that I mentioned in reply #8 and start from there.