System Re-Boot Cycle

[ParanoidAndroid]

Good Afternoon.

PCSpecialist build system ~ 2 Years old

System :
CPU : Q9450
MoBo : Striker 2 Formula
PSU : FPS 1010W
RAM 4GB Corsiar Dominator
GPU 9800GX2
O/S Vista Ultimate

My problem, which has just recently come to pass is on a number of occations following booting up the system. The PC Commences into a cycle of re-boots. Basically the system boot to the windows login screen. Then re-boots again. Then after a while it progresses as normal, where I can login and all is fine. I was thinking it would be a PSU issue - of some A virus - Virus scan is upto date with nothing signalled. Spybot does not signal any issues - nor does the other series of additional software check I perform. I'm somewhat stuck as to how I can actually test the system to determine what the issue is. The windows error manager thing does not shed any light into the cause of the problem either.

Any help hint's or tips would be most welcome.

Regards

Paul

 

[vanthus]

Try start up repair.
Insert windows7 os disk,restart & tap f8 key.
This will bring up boot menu,choose optical drive as boot source,then press any key to boot from the windows7 disc.choose preferences for language & time.
Click on repair your computer.
Click on start up repair