I have just upgraded to an Intel DX58SO2 Extreme range mobo, with i7 960 CPU; 3 X 2 GB kit of Corsair Dominator C7 RAM; Gigabyte GTX 550 Ti graphics card; I x TB Black Western Digital SATA Hard Drive. The Intel operating manual for this motherboard says it supports Windows XP 32 & 64 bit systems. When I tried to load Windows 32bit XP Pro SP2, it loaded the DOS programs on the RAM, but every time it reached the point where it says "Starting Windows", it would BSOD with the following error message: Stop: 0X0000067B (0XF78D25240XC0000034.0X00000000.0X00000000) I am able to do a clean install of Windows 7 64bit Ultimate by itself without any problem. I've updated the BIOS and tried various variations to it, but all with the same result. My intention is to have both XP Pro and Win 7 Ult 64 bit loaded on the hard drive. Any help would be greatly appreciated.