I have two monitors, the primary one (@2560x1440) and a secondary one that is oriented to the right of my main monitor in a vertical position. (@1080x1920)

I updated my 3090s driver to the latest ones (516.94 on Windows 10) and now Nightmare Reaper is loading only on the vertical monitor. (which looks just fantastic btw...)

I Ducked It and found a Steam post saying lower the resolution and drag it, and maximize it again. Did this. When I go back to full screen it goes right back to the vertical screen again... I verified the game, uninstalled and reinstalled and it didn't help. I unplugged the secondary monitor completely and ran the game. It loaded but the monitor selection option describes my main monitor as "unknown" when before it wouldn't even let me select anything other than the secondary one. This is weird.

I loaded every other game up on my PC and they all run perfectly. This is the only game causing this. Please advise me on a fix. Thanks.

Nevermind. (not having good luck lately)

I dug deeper and found that Windows Update had replaced my monitor .inf driver with some other version. I reverted to my previous driver and Nightmare Reaper works again.

I wish Windows would stop trying to manage my drivers; it only causes issues.

Apologies.