If you can't turn on Windows Security or Windows Defender Security Center in Windows 10, this article will show you how to fix it.

We all know that Windows Security (earlier Windows Defender or Windows Defender Security Center) is the primary AV program comes built-in with Windows 10. Microsoft has continuously developed this security suite and today it can compete easily with third-party AV programs available in market.

For some anonymous reason, if Windows Security is disabled or turned off on your system, this article will show you how to turn it back on. You can try below mentioned suggestions and see if they helps to solve this problem.

FIX: Can’t Turn On Windows Security/Defender In Windows 10

FIX 1 – General Suggestions

1. As soon as you detect this issue, reboot the machine and check if issue resolved automatically.

2. If issue still persists, open Services snap-in (run services.msc command to get this) and make sure these services are Running and have corresponding startup type:

  • Windows Defender Antivirus Threat Inspection Service – Manual
  • Windows Defender Antivirus Network Inspection Service – Manual
  • Windows Defender Antivirus Service – Automatic
  • Windows Defender Firewall – Automatic

3. Turn on the real-time protection as mentioned in this guide.

4. Update virus protection as mentioned in this guide.

5. Perform clean boot.

FIX 2 – Completely Remove Third-Party AV Program

If suggestions mentioned above didn’t worked for you, it might be possible you’re having third-party AV program installed. Unless you remove that third-party AV, Windows Security won’t be turned on.

Please try these steps:

1. Open Windows Security app and check if you’ve third-party AV installed. Do this, even if you’ve previously removed third-party AV program.

FIX Cant Turn On Windows Security/Defender In Windows 10

2. Scroll down in the same window, and click Manage providers link.

FIX Cant Turn On Windows Security/Defender In Windows 10

3. Moving on, under Security providers screen, you can see that third-party AV and its firewall is turned on. To avoid conflict, Windows Security can’t be turned on.

FIX Cant Turn On Windows Security/Defender In Windows 10

4. So go to Settings > Apps > Apps & features, locate your third-party AV program and click Modify and select Remove or directly hit Uninstall button (subject to availability). Some third-party AV program vendors provides dedicated tool to completely remove their AV program, so you can use them as well.

FIX Cant Turn On Windows Security/Defender In Windows 10

Once you completely erase your third-party AV program, reboot back and Windows Security will be turned on/activated automatically.

FIX Cant Turn On Windows Security/Defender In Windows 10

Hope this helps!

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Recent Comments

  • Tin : Thanks a lot - eveything back as it should be with Defender (Win 10 19...

    2 hours ago

  • Kapil Arya : ^^ Thanks for confirming this, David!...

    18 hours ago

  • David A Coyle : The Manu Shukla solution worked for me also....

    18 hours ago

  • Stalker8 : Hi Kapil here is the working link majorgeeks.com/files/details/microso...

    1 day ago