Hello I'm recently experiencing hangs and freezes regarding the error application not responding which happens to almost all of my programs, preventing me from ctrl-alt-del so I end up cold booting. This has been happening whenever I play fullscreen games. I've searched for similar problems and I came across a thread talking about dwm.exe being the culprit so I disabled it from startup. After this the problem seemed to have disappeared, at least temporarily. After 2 hours playing Civilization 5, it happened again. I cannot seem to track the source of it because it doesn't show up in event viewer besides the cold booting errors. Though after this one specific cold boot, I did get Event 129, iaStorA which states there was a "Reset to device, \Device\RaidPort0, was issued". This is the first time I've seen this error but I'm not sure if it pertains to this specific issue as I've had to cold boot several times today trying to isolate the source but with no results. Is there a better way of isolating the issue since event viewer can't really find the source? Edit: I forgot to add that I can still hear audio (Skype, game, music..) whenever this happens. It just seems to freeze everything else but audio.