Hi,
To access Disk Cleanup, go to the search bar, select > Clean up system files > check everything except > Downloads, and click OK.
Open the command prompt (admin) and run the commands: sfc /scannow and dism /online /cleanup-image /restorehealth. Wait for the process to finish and restart your computer.
If possible, take a screenshot and post it here.
Access Task Manager > find Windows Explorer > right-click > restart.
Thanks