Also after that I was unable to uninstall the drivers and revert back to 13.1 (even with driver sweaper). Cgminer was also crashing upon startup. I had to reinstall Windows 7 64 bit to get all fixed.
People need to learn how to image backup their OS before messing with drivers. I've seen quite a few people already reinstalled their OS, because of a driver failure of some sort.
https://en.wikipedia.org/wiki/Disk_imageFew softwares that can do it, clonezilla, acronis true image. Probably a lot more. But those two are the main two.