Photoshop :: Layer Style Window Opening But Disappears

I just began having problems with Photoshop today. I wanted to apply Blending Options to a layer. The Layer Style window opened but it was nowhere to be found! Because I could not access this window to either perform a task or close it, I had to Control/Alt/Delete because nothing else in the program would work. Obviously, it was waiting for a response to the window but as I couldn't see it, I couldn't access it. I've never had this problem before and I've just spent four hours trying to find the problem, including messing with screen resolutions and monitor designations (I use a laptop with a flat screen as #2 monitor). Can someone please help me!!Thanks, in advance, for your advice.