Windows Defender Fatal Error on Windows 10 Home Single Language

In the past, I did run Windows Repair version 4.4.0 and 4.4.1 with all repair options enabled in Safe Boot without any errors. Everything was fine including Windows Defender.

Then recently, I have an error code 0x80004005 on Windows 10 Home Single Language. So before the repair process, I update the Windows Repair software to the latest version 4.4.2, I run it in Safe Mode, to repair this error code 0x80004005 (Can't Copy/Rename/Paste/Delete some folders and files).

Amazingly, it can fix the error. But apparently, my Windows Defender has a fatal error. It can't scan anything, the Real Time Protection is off and I can't turn it on. The Right Click option to scan folders/files is gone, etc. See the picture attachments for more info.


I do all kind of these methods so many times to repair this Windows Defender fatal error:

- CHKDSK.
- SFC /SCANNOW.
- Create new user accounts with administrative privilege.
- Log in into Administrator built-in account.
- Run Windows Repair twice in Safe Mode.

Unfortunately... Nothing works.
I like Windows Defender very much. It is fast and small. It is a very good antivirus/firewall/antimalware.

Maybe uninstall then reinstall it could fix the problem? or some registry tricks?

Please help me...