Running a System File Checker (SFC) scan will repair the damaged DLLs. If that doesn’t help, you can use a Deployment Imaging and Servicing Management (DISM) scan to restore system health.

Corrupt Windows Defender system files: The system files or core files of Windows Security may be corrupt, and hence it cannot start the offline scan.

It can take a while for the System File Checker to scan your machine and to make any necessary repairs. When the process completes, you should see an indication of whether or not the System File ...