Windows 10: Windows Defender cannot be started

Hi, today i did two things:
Installed malwarebytes just to run a single scan, and also windows update installed two updates

-windows-10-update-kb4566782

-kb4569745-cumulative-update-for-net-framework


after this i uninstalled malwarebytes since i didnt wanted to interrupt the default windows antivirus from microsoft, and ofcourse had to restart pc for updates to take effect.

The updates were installed successfully, the first thing i noticed upon first logon, task manager was disabled , ok i thought to give another restart, now the task manager is ok , but windows defender seems to be a problem now, i looked through diferent answers and none of them resolves the issue in my case.
when i goto Services Windows Defender Firewall says Disabled and gives u zero options to modify its settings. like enable, start, restart, they all greyed out. i hae no idea what happened or what caused this, maybe that malwarebytes deleted some registry values of windefend.

here some screenshots:



now when i goto Settings, Update and Security, Windows Security, see the image below:




i am a windows user for many years and know many things already, but this one throw me out, Thanks for any help.

:)

 

window defender

• • • 
      You will want to print these instructions for offline reference -
      

IMPORTANT => DON'T SKIP ANY STEP perform all Steps in one uninterrupted session - If a Step says to reboot
reboot.

Problems starting Windows Defender in Windows 8/8.1/10

Pləase let us know what fixes the problem or if the pяoblem remains.

• • • 
      `~`
      

 

Windows Defender Anitvirus

Hello,

There are multiple reasons why you are having issues, enabling Windows Defender. To assist you with your concern, you can refer to
PrashantKumar96's
Forum Article on how to fix Windows Defender not starting.

We suggest that you try the troubleshooting steps listed there, especially the number six troubleshooting step.

Let us know of the outcome.

Regards.

 

Windows Defender problem

Hi Ernst,

To troubleshoot this issue, we suggest that you check the Windows Defender service if it's running. If you are using a third party spyware/malware program, it may disable the Windows Defender service. To do this, please follow the steps below:

• Press Windows + R key.
• Type services.msc.
• Right-click Windows Defender service and click
  Start.

Let us know the result.