Trouble booting Windows. Maybe motherboard's fault?

[pgasenas]

Hi. When i was working with my new PC, it suddenly restarted and did not boot any more (it loops restarting when reaches the moving XP progress bar). I verified that cpu and chipset temperatures were normal. Another annoying thing was that it showed at BIOS startup "no keyboard" message. I thought that maybe windows installation was corrupted. But even when i tried installing a new copy of WINXP on the same RAID 0 array or even separate another HDD, i got the same result.
So maybe anyone has any thoughts, what could have happened to this PC? Could something occur to the motherboard?

pc specs:
mainboard: MSI K8N SLI-FI nForce4 SLI
RAM: 2x512MB corsair DDR
CPU: s939 AMD Athlon64 3200+ Venice
VGA: Gigabyte 6600GT 128MB
Storage: 2xWD 250GB 16MB SATA

 

[MagnusTheBrewer]

Welcome! First turn off reboot on halt in Windows safemode. That should enable you to read the error being generated. Bad ram, GPU, PSU are more likely culprits than your MB. Is your KB USB?

 

[pgasenas]

yes, my keyboard is USB. I thought maybe something with USB controller, bt then i saw in Safe Mode that my USB mouse worked.