You can try using the free version of Fraps or Game Booster 3 for screenshots if the Steam solution isn't working for you. I use Game Booster because it also reduces the number of Windows services running while I play games so it saves memory despite having another application running in the background. Best of all, it's totally free!
The Game Booster 3 looks pretty good, I think I'll try that out. I'd like to be able to take screenshots, so hopefully this works.
Wait should I get the version 3.4.0 or the 3.5.0 that's in Beta?
Been away for a bit, but sneaking back in.
Gaming on: PS4, PC, 3DS. Got a Switch! Mainly to play Smash