PC wont restart

[Carl29]

Hi, I've just installed a new motherboard and, and poer supply on my pc, and at the same time i've also installed a new winxp pro installation.
Everything works fine: The only thing is that when I go to "start > turn off" and choose restart; the PC starts to turn off everything just like normal till the blue microsoft windows screen that says saving profile, and then it stays there. Basicaly the pc wont restart, but it turns off normaly when choosing "turn off" .
What it could be?

thanks

PC:
MB: INTEL CORE2 ASUS P5QL EPU SK775 DDR2 PCX
CPU: INTEL CORE DUO E5200 2.5 GHZ SK775 800 MHZ 2MB
POWER SUPPLY: COOLBOX POWERLINE F-500

 

[Lexluethar]

Bad install of the OS. Since it is Xp try a repair install (it will keep your software and documents).