It Indeed Worked. Fixed a lot of other problems too.

Is there any chance that the upcoming Spring Update will work like a Repair ??

Repair might fix it. But at this moment I cannot afford to lose data.
That is why I have been searching for a simple fix.
I really doubt it first started after uninstalling IObit ASC. But, I am...

No, There is no policy set. No other Antivirus or anything. The Real-time protection is different in these two application. That is concerning me. I have tried everything possible. (Only Reset left.)

No, It is the latest and up-to date version.
You can access that old version from:
Program Files\Windows Defender\MSASCui.exe

Can Anyone figure this out??
The Real-time protection is turned on and working fine. But from the security center you can see the protection is turned off. Quick Scan Button and Advanced Scan button...