Render preview window not working

[mattjgerard]

I've been doing almost all of my rendering on the NR license we have now, which is awesome. Just because, I started rendering some stuff locally, testing to see  what the speed comparison is between my local 24C machine to the server IT set up for use at 32C. I think my local machine is actually faster, but that's besides the point

Anyway, rendering locally in any way, background, default, using the queue or not, I can't see my render in the preview window as its rendering. It just shows black. I have a hunch that this cropped up when we updated to 7.2, but I can't pin that down. The render turns out as expected, but just can't see the progression as I used to.

Reason I was doing this is because I have some renders that are coming back from the NR that look different  than what I'm seeing in my live window, so was trying to troubleshoot why that was happening. I've heard of a couple others that were having the same issues. Nothing has changed on my installs or versions, so its most likely user error.

Anyway, any ways to reset the internal render system or tweak graphics card settings? I'm running a GTX980 Windows 7 KS 7.2. Thanks!