UPDATE 2:
Re: saddenly, after the second system restart, prime video, Netflix app and edge stutters. There is something wrong with hardware acceleration or similar. Others are experiencing the same. Also, halo masterchief collection on windows 11 (windows store) has the same issue when opening xbox bar and/or when achievements are displayed, causing massive stuttering until they’re gone.
UPDATE:
22.8.2 first release in months which doesn't give me error 1603 and/or black screen at installing\uninstalling the drivers.
Also, video playback issues solved too!