[TiSwAs]

Hi.
Using Windows XP Pro SP2
Running McAfee VirusScan 7.1 - including latest updates.
Running Sygate Firewall + Windows XP firewall.

Story
Last night left my PC as normal downloading files, came to it this morning at the user/pass prompt, thought that’s strange.
Put in password and it logged on as normal, so thought to myself that the power might have gone off during the night.. no problems......
Until the desktop appeared and then disappeared NO error messages at all - trouble is it is continuously doing it loads desktop then disappears (I presume it is crashing and explorer is reloading as the dwwin.exe process runs then disappears in task manager along).

I've started in safe mode and get exactly the same thing, no errors at all.

I can't access anything as the explorer.exe keeps crashing, i CANNOT rebuild this machine due to the data held within.
The only thing i haven't tried is a repair from the master disk as i would
a) like to know why it is doing it
b) if there is another method of repairing.

Regards
Dave