I notice you mentioned, Stardock's Fences, right? What version of Fences you're on? Is the issue do not happen when you disable Fences? And also, I still need what version of Windows version you're on? As I mentioned on my first reply you can get that information using Winver.exe, which is a program that come along when you install Windows.
These questions, I asked you, so I can help you. And I can give you pointers on how to solve it. But if you can't give me these answers, than I can not help you.
Stardock Community Assistant