Hey guys, I'd be over the moon if anyone could possibly help me with this since it's driving me crazy. Basically, for some reason recently my applications keep crashing, basically not responding and then after a while closing, or even if I leave it and wait for it to respond it will never respond, it requires a shutdown. Even my Windows Explorer is started to take a while to respond and occasionally crashes. Also, whenever I try and reopen one of these applications, such as Steam, it will not reopen. I see the task in the task menu, but it will just stay there for a while and then close itself without giving me any notification and repeats when I try to reopen it, it actually requires a restart to work. But then here's another problem, I can't shut down my computer without a BSOD coming up. My games keep coming up with critical errors and then there will be problems with launching the game since my Steam keeps crashing. This is the most frequent program that crashes, but it's also my internet and content such as images or video's will crash as well. I also can't play media from my desktop when this happens such as music and videos once again. This happens about 5 minutes after my computer is running, when I first launch it it's not exactly quick, (a lot, lot slower than it used to be but I guess that comes with loading it up with games etc...) but at least things load. As well as critical errors I sometimes get a BSOD while playing a game or even just on my application and these have varied from memory management to driver IRQL's or something along those lines. My system specifications are as follows: Windows 7 64bit Professional ASUS M4A79T Deluxe Mobo AMD Phenom II x4 965 BE at stock clocks (3.4GHz) 4 GB 1666 MHz G.skill Ripjaw RAM ATI 5970 at stock clocks and voltages Personally my initial reaction was that this was a problem with the RAM which would explain most of my problems but I've run memtest for around 4 or so hours (someone tell me if I need to run it longer) and there have been no errors so now I'm not quite sure what to point at. Any help would be massively appreciated since I really can't put my finger on it. Attatched are a series of blue screen minidump files I've been having.