XP is not always fixable. Maybe the damage runs beyond what any repair install can offer?
In focus -> Think over what a repair install does. Think about what files and registry items it doesn't touch. There is the the problem.
This has come up twice in the last couple of days. XP pro, moderately hosed up, before the user did the stupid things the computers were fully updated-incl SP3. Made a ghost image first thing then inserted XP pro disc, install, repair install option. Seemed to run usual amount of time, however, final reboot would not go into anything but safe mode. Tried turning off many of the usual things that stop normal boot, still haven't found the right combo. Should I have removed SP3 before repair install? Tried slipstreaming SP3 onto my xp disc? What about installing sp3 inside Safe mode? Thanks for any help.