I had this problem.
You have a nvidia mobo as well.
You don't have Mediashield installed which comes as an option with the motherboard drivers!
Do a driver reinstall and choose to install mediashield. It should all be fine then.
As I listen to some music on my PC! I just wanted to take a minute to thank The_Rocker for helping me solve this problem, and thanks to everyone else that offered suggestions.
Not having Mediashield installed was my problem.
Thanks again all