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OMEN by HP 45L Gaming Desktop PC GT22-0000i (393C5AV)
Microsoft Windows 11

Hello, all of a sudden when I closed a game, the resolution on my desktop changed , even the icons where displaced all around, smaller even the dropdown menus in the GUI are smaller. When I open the screen's settings it's selected and active the right resolution (5120x1440) but it doesn't look right anymore.

Infact only few games now are working properly in full screen but many others are not, I have black bars on the sides, even Netflix or other video players are not working properly anymore, same problem I have black bars on the sides. 

I have tried everything, changed resolution, clean installtion of the GPU's drivers, I even reboot the PC and reinstalled everything. Don't know what to do. This problem has already occured few month ago, but it solved by itself don't know how. 

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