I had this issue yesterday, I loaded up my computer and when I loaded up steam, I got a blue screen saying "Windows has detected a problem and has shut down to cause any damage". This kept happening until I updated my windows and it solved it. Today, the same thing happened, but my windows is up to date. I can use my computer completely fine until I launch steam, it opens for second, then it crashes my computer to crash. I am currently running Windows 7 Home Premium. If anyone has experienced this issue or knows of a solution, please post a comment, thanks guys.