When experiencing symptoms like that, I usually do as any MS supporter would tell you. Reinstall Windows from scratch.
Make backups of important stuff.
Reformat the drives
Reinstall and apply drivers
Give it a try, usually works well..
Regards
My opinions are my own, I do not work for Asus or any other manufacturer of computers or computer parts. I do not speak on behalf of anybody, but myself.
//Blessed are the cheesemakers