winxp crashes

Hi,

I have dualbooted linux fedora 7 a week ago. It works fine and so did winxp. I didnt alter the grub loader other than making winxp the default. Now a few days later without doing anything to either OS the winxp is rebooting after a few minutes.
I get a recovered from serious error every time i boot with winxp a few popups appear then it reboots without warning.
The partitions are seperated I can say that

I have 2 HD's
c: and f:
f: has a limux partition at the of F:/ back after a defrag on the drive. So f: has 2 partitons and c: has the winxp. I havent changed with any partitions or system settings or nothing and it worked fine for a few days.
Is this a major time to panic?

 

Start by checking the Event Viewer in Control Panel, Administrative Tools. It should be listed under System, the Type will be Error. Double click on it for info.
Bug

 

Also for reboots:right click My computer>advanced>Startup and recovery>uncheck automaticaly restart.