Well I have tried everything I know, thats why I am here is for you help of what are causing all these Blue Screens with various errors. Some times it won't even boot into windows or safe mode, and other times it will get into them but crash soon after. I have ran the built in memory test in windows, I have even tried each memory stick one at at time. I use hard disk sentinal and it doest report any harddrive problems. I don't know if in the logs it will show but it might have my onboard nvidia video device disabled, I did try that too. All of this started after I put in a pci-e ati video card, but since then i have formatted and reloaded windows and I still have the problem so I don't know what is going on. Every time I try to uninstall the nvidia video drivers from control panel it will give me a bsod 0x0000004a which probably isn't in the logs because I already had the logs made before this happened.I then ran driver sweeper and ccleaner to remove it and then it started up in regular mode and stayed on for the longest it had in a long time, then i got this bsod error 0x000000d1 then it mentioned ataport.sys, which also probably isn't in the logs but if you need them I will redo my logs if I can get my computer to stay on long enough. Hope we can get this figured out, I've been trying to figure this out for about 2 weeks. I am using Windows 7 Ultimate x64 and my mainboard is the Biostar MCP6P M2+ Ver. 6.x and I'm using on board video.