Starcraft 2 game randomly stops responding. Cant figure it out need help!

Hey guys was hoping someone would be able to help me with my problem. My game will stop responding and lock up but all other programs keep running like normal its just starcraft 2 that is not responding. I dont play any other games so i cant say if it would happen during another game buit did do a the valley test(see below) Ive tried logging information to see what else is running and when it happens but it it varied greatly, from the first game of the day to the eleventh with nothing else running in the back round to having grooveshark or a twitch stream open on my second monitor. I ran the valley benchmark on ultra for a little over an hour to see if it would crash my video card but nothing. I ran the sea tools hard drive test on long generic and it passed that. If anyone can please offer some insight I would be so grateful this is so frustrating.

My comp specs are: P: Intel core i-7 3770k cpu @ 3.50 Ghz

R: 8GB DDR-1600

NVIDIA GeForce GTX 660

SATA-III 120GB SSD + 1TB 7200rpm HDD

Windows 8

It has crashed under drivers 320.18 and 314.22

i tried repair the game client and found nothing and also un installed and reinstalled still stops responding Could it be the memory? or maybe over heating? i dont know what else to do. Battle.net tech forums was no help as I got no responses from any mods im getting desperate