Hi folks. Thanks for reading this post. Any help is very much appreciated. When I first switched on my PC (new self-build, less than a week old, the first few days have been fine until now) for the first time today, I discovered that it failed to boot. It got as far as the boot logo, flashed up a BSOD for a split second then attempted to re-boot. It was stuck in this loop. I then reset the CMOS to default settings (unplugged PC, cleared CMOS for 1 minute then plugged back in again.) Went into "Safe Mode", re-installed mobo drivers (onboard ethernet, SATA storage, and something else I cant remember atm), GFX drivers. This did not clear the problem. I can boot into "Safe Mode" and "Safe Mode with Networking". Would I be right in saying that if I can boot into safe mode that my problem is software/driver based and not hardware based? At this stage I wanted to be able to read the BSOD, so I invoked the safe mode menu and selected "disable automatic restart on system failure". Here's the weird part, it then booted normally without problems. It did not present a BSOD, it just booted as if nothing was wrong. When I then shutdown and restart the system, it powers up and hangs before it wakes up the monitor. I don't think it is booting at all when like this. The only way I can get it to boot "normally" at the moment is to clear the CMOS and select "disable automatic restart on system failure" from the safe mode menu. One other thing I tried (I have 2 memory sticks in the machine) is using each memory stick on its own, this made no difference to the problem also. Here's my PC spec, in case its useful. OS: Windows XP Pro x64 CPU: Intel QX6700 Quad-Core (4 x 2.66GHZ) Mobo: Abit IN9-32X MAX Wi-Fi GFX Card: BFG Geforce 8800GTX RAM: 2GB DDR2@1024Mhz HD: 250GB SATA300 Many thanks for any time and help you can spare for my predicament.