Wow this is an old topic. For anyone who happens to care, I'll leave what I did to fix this right here. I had this same problem: gray, distorted screenshots. I had been installing different ENBs, which meant resetting my Skyrim & SkyrimPrefs inis multiple times. During one installation, I guess somehow I absent-mindedly set my screen resolution to 1366x768 in my Launcher settings. My screen actually IS 1366x768, but most picture viewers can't read pics at that resolution -- those that can even open the picture at all have, you guessed it: gray, distorted pictures. Go to where your Skyrim and SkyrimPrefs inis are located, open up SkyrimPrefs ini and make sure your display is set for 1360x768 and NOT 1366x768. Under the [Display] section, change the number beside "iSize W=" to 1360, then change the number beside "iSize H=" to 768. If you do that and your printscreen button works again, smile, then do like I did and smack yourself in the f***ing forehead for driving yourself crazy over something that ridiculously easy to fix. Peace.
