Story: I came here once with an older build and found it to be very helpful, hope that it still is. So here it goes; Recently I had an urge to play Portal 2, and after installing it from steam I went to run it and it crashed immediately. Being that I wanted to play this game really bad I attempted everything, googled around a little and found nothing but foolish answer like "update you bios" I don't see how my bios could be the issue here. After all, it does nothing after it reaches post, correct? Well when ever I launch Portal 2 sometimes it will make it to the menu screen but when I move my mouse it does the same thing as it not making it there. As soon as it loads it BSODs with a clock interval not received second clock in allotted time or something like that its to fast really. The problem only happens in NEW Valve games like Portal 2, SC:GO. I haven't tried any others. Oddly enough I can run Portal (1) just fine, no lag, no weird frame rate issues, its just fine. I'm going to add the .DMP files for someone to help me better. Things I have tried to do to fix it: I have tried a "skidrow crakfix" I have tried to run as admin/compatibly mode (XP SP2) I have uninstalled my gfx drivers, and re installed them. I have re installed chip set drivers. Monitoring resources while game is launching and nothing is being maxed, temps are normal. My system specs: Asus Crosshair IV Formula (mobo) AMD Radeon HD 6570 (GPU) AMD FX(tm)-6100 Six-Core Processor 500W PSU Thanks in advance.