Hello Eli Makrelli,
Welcome to Microsoft Q&A forum.
This seems like an issue with encrypting as the error message said rather than with HDR itself. Before we proceed further, can you please run these commands in an elevated Command Prompt and let me know the output?
- cipher /u /n
- cipher "%LOCALAPPDATA%\Packages\MicrosoftCorporationII.WindowsHDRCalibration_8wekyb3d8bbwe\LocalState"
- cipher "%LOCALAPPDATA%\Packages\MicrosoftCorporationII.WindowsHDRCalibration_8wekyb3d8bbwe\LocalState*.icc"
I'm waiting for your reply.