QuaD,
You describe a computer and symptoms that were identical to my own. The problem just might be your "NV" drivers. I am running an NVIDEA GE FORCE video card as many of you are and my system was crashing in just about every other game, just as you describe here. However, my problem is now fixed and I no longer crash... ever. Also, my PC runs much quieter, and also much cooler. For those of you running an NVIDEA/GE FORCE card... try this. My game was crashing for weeks. While researching, I found this link. I tried it, and it worked like magic. The bottom line is that NVIDEA created a new toy called SHIELD and they want all their customers to buy this shield. So... all their driver updates now include an executable where the updated driver looks for SHIELD. So, when you update your driver, your new driver automatically looks for SHIELD, and it does this several thousand times per minute. It is a resource hog and it drives up your speed and heat and memory a great deal. The result... another crash. Just disable this file and the crashing problem goes away. At least it did with my unit. Here is the link to explain the process: http://systemexplorer.net/file-database/file/nvstreamsvc-exe
TLDR;
This Service = nvstreamsvc
This service was included for the NEW Nvidia Shield Handheld Devices to work in unison with PC. Also this service checks for internet connection every 0.2 of a second as well as checking for SHIELD devices itself. If not necessary, this service should be disabled in Services
Not that I have, or necessarily would do the above. Just wanted to put the info there in case anyone didn't want to follow the link.
This is the second thread I've seen that amounts to "buff Comet". While that is a fine topic for a thread, even if many seem to disagree, one thread will do.