I think I'm having the same problem that G_Man had. I have an Asus A7N8X Deluxe motherboard and an Athlon XP 2500 with the Barton core. I have my BIOS settings as FSB - 166MHz and 1st Boot - HDD 0. The computer boots to the Windows XP screen where the little square dot goes from left to right to left and then my screen goes black and after about 10 seconds it restarts itself. I have all my jumpers on the board set at factory. I haven't tried disabling the RAID and SATA jumpers, I will try that, any other suggestions? Please help!!