I have a GTX970 after playing OW2 for a few hours today and alt-tabbing the game (running in fullscreen) became a solid black screen with cursor visible. The only option I had was to end the task. Upon doing so the scaling on my OS went haywire, think 400% zoomed in on everything, task bar became pin needle sized.
I double checked my OS resolution, scaling settings, task bar scaling and everything looked normal.
To resolve I had to do a clean install of my nvidia graphics drivers for the GTX970.
Just posting this in case someone else runs into it…and hopefully they’re not reading my text as size 0 font! I’ll update thread if this continues to happen. No issues in other games or applications with this driver.