I'll first start off by saying that the issue GENERALLY doesn't occur unless I'm doing something remotely stressful for my computer. This issue used to occur whenever it felt it was necessary, however has not occurred completely randomly for a while now (thankfully)

My computer's specs:

CPU: AMD Phenom II X4 960T
GPU: GeForce GTX 760
Memory: 16 GB RAM
Resolution Used: 1680x1050, 59Hz (strange number for refresh rate?) res is highest for monitor
Nvidia Driver version: 331.65 OS: Microsoft Windows 7 Ultimate (64-bit)

Sometimes I will be able to go 2-3 games (about an hour, depending) and sometimes it will go maybe one game (20-30 minutes) and then my computer will run sluggishly and leave me unable to do much of anything.

I can sometimes interact with programs at a very basic level (maximizing, minimizing), and I usually cannot close them in any way, not even through Task Manager.

The highest temperature my GPU reaches is 76C, with the average being around 73C. During the time the temperatures are around 73C, my GPU's RAM usage is anywhere between 1250-1300 (out of 2GB).

My CPU's temperature never goes over 60C, thankfully.

The PSU should be fine. It's very mildly dusty but I feel as though that would not be causing this problem... I will clean it out as soon as everything else has been ruled out. Honestly I have no clue how to test the PSU for problems - same goes for my Motherboard.

I cannot really think of what could be causing these freezes otherwise.

Event Viewer details:
EventID: 1 - VDS Basic Provider (I've no clue what this is)
EventID: 3 - Kernel-EventTracing (Again, lost)
EventID: 8003 - bowser (this seems fishy)

and the one critical that I know others have been dealing with as I've browsed some other responses on the web: EventID: 41 - Kernel-Power

any help to solve this problem would be GREATLY appreciated.