Glad you sorted it out. Same thing happened to me about a month ago. Its something about one of the windows updates screwing with the video drivers, especially of you did not have the stock drivers.
Nothing solved it except for a restore. I have disabled updates, and can't wait to get away from windows 8/8.1/8.infinity/windows zillion ect.
Might just have to get back to my Linux days.
I use to say ASUS like AZEUS because I thought their products were the Gods of electronics...