Hello, thank you for reaching out to Microsoft Q&A.
Could you please share the exact error message you receive when you open the File Explorer?
Open the task manager and restart the Windows Explorer process. If the issue persists,
- Open the command prompt as Administrator.
- Run the commands one by one and click Enter for each command.
Dism /Online /Cleanup-Image /RestoreHealth
sfc /scannow
Once completed, restart your computer and open the File Explorer.
If you still receive an error, please share the screenshot of the error message here.