Hello Windows 11 question 11, welcome to the Microsoft community!
According to your feedback, you are experiencing a problem with the HARMONYBACKUP folder that cannot be removed!
I would like to check with you if you have downloaded the program ZoneAlarm?
If you have, you can post this question at the following link:
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You can also try changing the owner to your account or administrator group. Grant full control to authenticated users.
See if you can remove it completely
I hope the above information is helpful to you!
Kirito|Microsoft Community Support Specialist