Recently I am noticing that I get temporary freezing when playing video games such as Left4Dead 2 and MW2. This freezing only happens about every 20-30 min and I can easily fix it by ctrl+alt+del then going back into the game. I checked the temp of my GPU and its only at 36 C. Cpu is low as well. What could be causing this? All my specs of my computer are listed under my system. Thanks in advance for your help.