Try to go to "Run.." and edit "cmd" (without the quotation marks).Now opens the DOS box. Edit the following: "shutdown -s", if you want to shutdown and "shutdown -r", if you want to reboot. If this fails, I would do a new install of Windows XP with your nLited CD. Are you sure, that your PSU is ok and strong enough? do i have to edit shutdown -r everetime i have to restart ??? I think my system is ok And i do realie DONT whont to reinstalle windows had that s... My system: MB: A8N-SLI Nforce4 Premium CPU: AMD Athlon64 3500+ socket 939,b RAM: 2x512 Kingston valueRAM HD: 2x160 GB Samsung S-ATA II as Raid0 PSU: LC 6550G -Black V2.0 550W VIDEO: Sapphire X800 GT