Strange Coloring

Every time I load NTW it works fine right until I click on something on the Menu and it starts stuttering then all the colors go to little green, pink, and aqua squares and then it freezes then I have to quit out and try again and it still doesn't work.

post dxdiag please, preferably in spoilers

how to:

press: windows key and R

type: dxdiag

press the save button at the lower right corner

It's graphics. While you are posting the dxdiag, I suggest cleaning out your case and check your fans and vents.