I have a late 2011 15" MBP with Windows 7 and Mac OS X Lion installed in Boot Camp. Earlier this week I had a lot of crashes with Windows 7 that seemed to be video related (I would notice the video go haywire right before it crashed). I even updated to the latest video driver but that didn't help. The problem got so bad that I couldn't even boot into Windows 7 anymore. So then I managed to boot into Lion and the computer worked fine for a couple days, until tonight, when I tried to open a new Firefox window and suddenly the screen turned completely blue. Completely blue with no text and the computer was frozen. (I didn't know Mac OS X has its own version of the BSOD.) I had to restart and got the gray screen freeze described here - so I followed the steps on that page to try to get my MBP to boot up. I restarted again and tried to hold Shift to do a Safe Boot. I ended up getting a blue screen with vertical black lines - I attached a photo of that. Then I restarted again and tried the NVRAM/PRAM reset and still got the gray screen. I restarted again and tried booting from my Lion install DVD and still got the gray screen. After many restarts and gray screens, I'm not sure how I finally got Mac OS X booted up, but I'm logged in right now. Still, I am worried the crashes could continue. I originally thought something seriously wrong happened to my Windows 7 install, but now that I had a crash in Mac OS X, I'm wondering if there's something wrong with the MBP itself. Since the problem looks like its video related, could the GPU be dying?