i found this at
How to Disable a Service or Device that Prevents Windows from Booting
(244905) - If a service or device driver is started automatically and is incompatible with the current version of Windows, the service or device driver may not allow Windows to remain running long enough for you to shut down the service or disable the...
My pc seems to have a odd problem.When i boot my pc, it shows the window xp desktop screen and then immediately power goes off (does not reboots).
But if i start the system, and go into the bios setup ,remain there.