Today when I wanted to update the windows defender, it was displayed that Real Time Protection not available.

Real time protection is turned off. You should turn it on. I had turned it on.

The message appeared like this: Real time protection could not be turned on. The operation returned because the timeout period expired. Click Help for more information about this problem. The support information Error code is Ox800705b4.

Please how to manage to the Real Time Protection on and how to update the Windows Defender?

Regards.