Hi all! I've been getting many x124 errors lately, and it's been starting when I installed windows 7 professional 64-bit. I've had the same system before when I was only using the 32-bit version of windows and it was relatively stable then (only a few weeks back). I've ran memory diagnostics and it comes out clean. From what I could tell from the minidump files is that the problem is related to my cpu (AMD phenom II 9950 quad black edition). But I'm not good at debugging nor can I really comprehend minidump files. In my BIOS I have tried loading up failsafe defaults and I am not overclocking my cpu. These crashes appear to be random... I can just sit at the desktop and it will crash or it can crash while I'm browsing the web or listening to music. Can somebody please help me? I've had the same problem when I was running vista ultimate 64 until I moved up to windows 7 32. Attached are the minidump files I have. Thanks for all your help guys!