Go into Control Panel > User Profiles and make sure you are the administrator. If not, change the account type.
If you don't have Pro version where Group Policy has been set to manage settings, then it could be a bug, possible caused by your antivirus. So I'd first uninstall the Antivirus to try running with built-in Defender which always offers best Windows performance with least issues, and is from Microsoft who knows how to protect their OS best.
This can also be caused by a wrong setting or a few wrong registry values.
See also the fixes here:
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