Just an update. The link that Zlip792 gave that goes to that special driver Nvidia made seems to be working well. I installed it shortly after Zlip posted and have not had the pixellation issue. For good measure I upgrade to Windows 8.1 this afternoon and have not had issues.
I'm going to give it a few more days, but will mark this question answered with that suggestion as long as nothing goes wrong. If you are having a similar issue, give that driver a shot and see.