How to Fix Virus And Threat Protection Engine Unavailable Issue on Windows 11

The Virus and Threat Protection Engine is built into Windows and protects your computer from viruses and other threats. But when the Windows Defender update fails to run on the device, you get this “Engine unavailable” error. There are many user reports of people who are upset about a warning that says “Windows Defender Engine is not available.” This keeps users from running security updates and stops them from protecting their computers from threats. But most people don’t know how to Fix Virus And Threat Protection Engine Unavailable Issue on Windows 11.

Let’s say you have similar problems and are looking for ways to solve them. The Virus and Threat Protection Engine is built into Windows and protects your computer from viruses and other threats. But when the Windows Defender update fails to run on the device, you get this “Engine unavailable” error. Visit their official website for more support.

How to Fix Virus And Threat Protection Engine Unavailable Issue on Windows 11

How to Fix Virus And Threat Protection Engine Unavailable Issue on Windows 11

Restart Windows Defender

  • Click the Start button on the desktop to open the Start Menu, type Command Prompt, and then choose Run as administrator from the right pane.
  • Paste the following code into the Common Prompt window and press Enter:
sc start WinDefend Enable

Remove Third-Party Security App

Your computer is safe from both online and offline risks as long as you have the Windows Security app. Still, a lot of people still put third-party apps on their gadgets.

If you use a third-party protection programme, turn it off to fix the problem with the engine being unavailable. You can do this by right-clicking on the app’s icon in the system tray and picking “Disable” from the menu that appears.

Check to see if the mistake is gone after you turn off the app. If you answered yes, you might want to remove that app from your computer.

Reset Windows Security

  • Press the Win + S keys together to open the Windows Search utility.
  • Type Powershell in the search bar and click on Run as administrator.
  • In the Powershell window, type the command mentioned below and hit Enter.
Get-AppxPackage Microsoft.SecHealthUI -AllUsers | Reset-AppxPackage
  • Once the command is executed, exit Powershell and check if the issue is resolved.

Edit the Relevant Registry Keys

  • Open Windows Run command dialog box.
  • Type “regedit” in the text field of Run and press Enter.
  • Click Yes in the User Account Control prompt.
  • Once you are inside the Registry Editor, navigate to the location mentioned below:
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender
  • Go to the right pane and find the number called “DisableAntiSpyware.”
  • Double-click on it, and then type 0 in the Value data box.
  • In the same box, do the same thing with the DisableAntiVirus value.
  • After that, in the Registry Editor, go to the following place:
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\Image File Execution Options
  • Here, right-click on the MSASCui.exe, MpCmdRun.exe, and MsMpEng.exe values one by one and choose Delete.
  • Then, restart Windows PC.

Causes For Virus And Threat Protection Engine Unavailable Issue

  • The relevant services are disabled: The important services that are needed to run Windows Defender updates may be turned off. This could stop the system from updating Windows Defender.
  • Windows Security’s files are corrupt: There may be a problem with the Windows Security programme itself or with the files that make up Windows Security. It could have gotten a temporary bug or a corruption mistake that caused it to act up.
  • Conflicting software: Software that doesn’t work well with Windows Defender and its processes could be due to software with similar functions.
  • Corrupted Windows files or malware: It’s possible that the important system files are broken, which is stopping Windows from updating. There could also be malware on your machine.
Editorial Staff
Editorial Staffhttps://www.bollyinside.com
The Bollyinside editorial staff is made up of tech experts with more than 10 years of experience Led by Sumit Chauhan. We started in 2014 and now Bollyinside is a leading tech resource, offering everything from product reviews and tech guides to marketing tips. Think of us as your go-to tech encyclopedia!

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