I am testing windows 7 on a machine and there are a couple of things that are causing me some grief. One of which is not too bad but the other is a real problem. The first problem is when I enable the AHCI SATA in the bios windows won't load it gets to the loading screen and then BSOD and reboots. When I disable this and run in IDE mode everything is fine. The experience index for drive data reading is 2.9 which if I am not mistaken is due to the mode that the SATA is being read. The other is the major issue and its associated with video playback. Whenever I am watching any videos Xvid/DivX I get BSOD after only a few minutes. I have tried many different videos with the same result. Here are the fixes I have tried: 1. Installed VLC - Still BSOD 2. Tried the windows update driver for GPU and the Latest release from Nvidia Specific for Windows 7 3. Tried 3 sets of Realtek audio drivers for the onboard sound 4. Installed Klite codec pack to try see if it was a codec problem. None of the above have solved the issue I have reverted back to the original setup and I am at a loss. There is nothing else going wrong so far other than this. No BSOD except during video playback. System Specs: Windows 7 build7000 64bit Q6600 Quad Gigabyte EP45-UD3R 4GB Corsair Dominator BFG 9600GT 250GB Sata2 Seagate Baraccuda 7200.10 LG 24" Widescreen Thanks for any assistance.