My monitor is on resolution 2560, but today I started up WoW and it only used like a much smaller resolution, like 1920. The rest of my monitor is black and I can’t use it, so it shows the game in a corner of my monitor… when I change the resolution to 1920 it goes back to full screen. When I alt-tab to another application it also goes back to full screen, but when I go back to WoW it goes back to the little version.
The letters in my mail and chat are a bit bad now… I had an update of my videodrivers and WoW also did an update yesterday, how do I fix this?
Some extra info, it’s in 2560 reso in the options and on full screen windowed. My monitor is also on 2560 reso, so I don’t get it why it is doing that.
Update After restarting my pc it suddenly got fixed 
but ok, solved 
(weirdly, my cursor was big, and in the options it was “normal” but i had to flip it between another setting to get it back to the default size)