Windows xp sp2 boot problems after power outage

At work this morning while the office admin guy was using his pc as per normal, we copped a power outage for 10 sec or so. the other 2 pc’s booted up again fine, but his won’t boot past the xp loading screen ( you know the one with the pretty blue bar running across the screen). It sits on that screen like it’s booting up normally, then when it goes blank like it’s going to desktop, that’s it, just blank. No HDD light flashing either. Now for the weird bit. When you hit the restart button and boot up in safe mode, voila, all the way to desktop and you can run programs with no problems (MYOB as an example). As I only had a chance for a quick look, I haven’t really dug around in event viewer etc. Any ideas???