Hello spenz,
Welcome to Microsoft Community.
I notice that you have tried using the SFC repair command to resolve this issue, but it doesn't seem to be working.
If it involves lost or damaged system files, I recommend you do a non-destructive repair of the device:
How to: Perform a Repair Upgrade Using the Windows 11 or Windows 10 ISO file
Disclaimer: Please back up all your important data before performing it.
There are corresponding illustrated tutorials and video step-by-step instructions.
If anything is unclear, please do not hesitate to let me know.
Best regards,
Mitchell - | Microsoft community support expert from MSFT