Not allowed to delete "windows.old" from my C:/ Drive.

[Windows 11]

I'm trying to delete Windows.old because it's taking a good chunk of my storage and I need that back. When I try to delete said folder, it asks for Admin permissions so I click "Continue" and hope it deletes. To my surprise, it says "You need permission to perform this action" and "You require permission from Administrators to make changes to this folder" I only have one account on this laptop and it's the only one that has Administrator rights.

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