I have had this problem before and had to reinstall winn 2k adv ser, but think it's down to the RAM stick. The defected hive is \sys32\conf\software. Prob came about whilst watching a vcd in RealPlayer and blue screen of death came up. I Restarted in hope that it would sort it out itself but forgot 2 go last good config.
I have no reg backup I know of and do not have access to the cd anymore, still have accces to hard drive though through win xp on another hard drive.
Also how do I access Recovery Console as I was told typing "chkdsk /p" might help.
Thanks in advance