Hi NB. I'm Greg, 10 years awarded Windows MVP, here to help you.
- See how to force remove unwanted languages in Windows 11:
https://support.microsoft.com/de-de/surface/rem...
https://www.youtube.com/watch?v=doE8zK9Bg08
- If nothing else works you can always reinstall Windows in the desired language, doing a Clean Install that wipes all partitions off the drive first so that nothing can resurface. Follow this best Clean Install tutorial: https://translate.google.com/translate?sl=auto&tl=de&u=https://www.windowscentral.com/how-do-clean-install-windows-11
Create bootable media following the steps under Create Installation Media, clicking to read the link "Before you Start" at https://www.microsoft.com/de-de/software-downlo....
Make sure during the booted install to unplug all other drives, boot the media as a UEFI Device, choose Custom Install, delete all partitions down to Unallocated Space to get it cleanest, choose the Unallocated Space, click Next to auto-create and -format the needed partitions and begin install - this makes it foolproof.
After install expedite all Windows Updates including Optional until no more are offered. Then import any drivers from the PC maker's Support Downloads web page for your model that are newer, or branded instead of generic. The most basic thing we need to learn to maintain a PC is how to keep the latest manufacturer's drivers current. Windows drivers are rarely enough.
Report back results for each step so I know what else to suggest.
Feel free to ask back any questions. Based on the results you post back I may have other suggestions if necessary.
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