Hello Christopher, sorry about your problems. My name is Marco and I will do my best to help you.
Try the another way to run Disk Cleanup is by using Command Prompt or PowerShell as admin. You can open Command Prompt or PowerShell and type "cleanmgr" to run Disk Cleanup.
Here are different methods at the following link: https://www.isumsoft.com/computer/how-to-access...
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Note: This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.