With further research online, performed the following:
I would suggest you to make the “Windows defender Service” startup type to “Automatic”.
Follow these steps:
a. Press “Windows key + R” from keyboard.
b. Type “services.msc” without quotes in the “Run” Window and hit enter.
c. Search for “Windows Defender Service”.
d. Make “Startup Type” to “Automatic”.
e. Restart the computer and then check how it works.
Perform System File Check (SFC), and then check if this fixes the issue.
Follow the steps:
a. Press “Windows Key + Q” to open Charms Bar.
b. Type “cmd” without quotes in the search box.
c. On the left pane, right click on the “cmd” option and select “Run as Administrator”.
d. Type ‘sfc /scannow’ without quotes and hit enter.
With no luck, the problem still remains...
As I mentioned above, the section to adjust to 'automatic' is unadjustable. (Has been turned to grey).
No errors were found.
Any suggestions would be greatly appreciated.