Windows Defender Service Missing; Security at a glance page is Empty

In the aftermath of malware infection, when you open the Services MMC on a Windows 10 or 11 computer, you may find that the Windows Defender (“Microsoft Defender Antivirus Service”) service is missing from the Services MMC.

The Windows Security settings “Security at a glance” page may show up empty as in the following screenshot.

On some systems, the following error appears when opening the Security at a glance page:

Page not available

Your IT administrator has limited access to some areas of this app, and the item you tried to access is not available. Contact IT helpdesk for more information.

Or else, the Security at a glance may show all the settings but may indicate to the user that Virus & threat protection is stopped.

Threat protection has stopped. Restart it now.

When attempting to restart the service, you may get the following error:

Unexpected error. Sorry, we ran into a problem. Please try again.

The Security providers page would indicate there are no Antivirus and Firewall providers installed on the computer.

In some cases, the providers would be listed normally, but it would indicate that the Microsoft Defender Antivirus is turned off.

When you open the Windows Defender program (“Platform”) folder below, the folder may be completely empty.

C:\ProgramData\Microsoft\Windows Defender\Platform\

Whereas, on a working computer, you should see two folders — one folder stores the latest platform files (e.g., 4.18.2205.7-0), and the other folder stores the previous platform update files (e.g., 4.18.2205.5-0) which is used as a fallback.

If the “Platform” folder or its subfolders are empty, it may be a handiwork of malware. In this case, the Microsoft Defender Antivirus service will throw the error “Error 2: The system cannot find the file specified”. [More Information]

Running the command sc query windefend to query the status of the Microsoft Defender Antivirus Service would show this error:

[SC] EnumQueryServicesStatus:OpenService FAILED 1060:

The specified service does not exist as an installed service.

Cause

The above symptoms are caused if the “Microsoft Defender Antivirus Service” (short name: WinDefend) has been deleted from your computer — most probably by malware or rootkit. Another possibility is that the “Windows Security Service” (short name: SecurityHealthService) and/or Microsoft Defender Antivirus service is disabled or not currently running.

In the latter case, the Security providers and the Security at a glance page would show up empty even if the “Microsoft Defender Antivirus Service” registration is intact.

Resolution

To fix the problem, set the Windows Security Service to Manual start. And then, restore the Windows Defender service if it’s missing from the computer.

Step 1: Start the Windows Security Service

1. Start the Registry Editor (regedit.exe)
2. Go to the following location:

   HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SecurityHealthService

3. Double-click Start and set its data to 3
4. Exit the Registry Editor.
5. Restart Windows.

Step 2: Repair/Restore the Windows Defender Service

To repair/restore the Windows Defender (“Microsoft Defender Antivirus Service”) service registry settings, you have two options:

1. Run a thorough scan (especially Rootkits scanning) using Malwarebytes and then reinstate the Windows Defender service registry entries.  (or)
2. Repair your Windows 10 installation by running an in-place upgrade with the slipstreamed Windows 10/11 setup media. Repairing Windows would restore the missing services.

In this article, we’ll see (“Option 1”) how to reinstate the Windows Defender service registration manually. After scanning and removing every bit of malware from your computer and getting a clean bill of health, the next step is to import the Windows Defender service registry keys.

Windows Defender service registry keys restoration

1. Download windefend-service.zip and save it to the desktop. The zip file contains Windows Defender service registry files for Windows 10 v21H2 and Windows 11 v21H2.
2. Start Windows in Safe Mode. (Note: If you want to merge the file while in Normal mode, you need to start regedit.exe as Trusted Installer.)
3. In the Safe mode, in the Registry Editor window, import the windefend-service.reg file via the File menu.
4. Exit the Registry Editor and restart Windows back to Normal Mode.

"%ProgramFiles%\Windows Defender\MsMpEng.exe"

Windows Defender service should be functional now. After the Defender service starts, Windows Update will fetch the latest available platform update. Install this. This is very important!

Be sure to install the Windows Defender Platform update that shows up on the Windows Update page.

Open the Windows Security settings pages (“security at a glance”, “security providers”, “virus & threat protection”) pages to verify if the threat protection is enabled.

Step 3: Verify Windows Defender Service permissions (Optional)

After you reinstate the Microsoft Defender Antivirus Service registry keys, you may verify the Defender service permissions by running the following command from an elevated Command Prompt.

sc sdshow windefend

The service permission DACL entries (SDDL) should look like this:

D:(A;;CCLCSWRPLOCRRC;;;BU)(A;;CCLCSWRPLOCRRC;;;SY)(A;;CCLCSWRPLOCRRC;;;BA)(A;;CCLCSWRPLOCRRC;;;IU)(A;;CCLCSWRPLOCRRC;;;SU)(A;;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;S-1-5-80-956008885-3418522649-1831038044-1853292631-2271478464)(A;;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;S-1-5-80-1913148863-3492339771-4165695881-2087618961-4109116736)

(In the above case, the SDDL settings are from a Windows 10 v2004 computer.)

The above SDDL means the following service permission levels:

  [0] ACCESS_ALLOWED_ACE_TYPE: BUILTIN\Users
	SERVICE_QUERY_STATUS
	SERVICE_QUERY_CONFIG
	SERVICE_INTERROGATE
	SERVICE_ENUMERATE_DEPENDENTS
	SERVICE_START
	SERVICE_USER_DEFINED_CONTROL
	READ_CONTROL
  [1] ACCESS_ALLOWED_ACE_TYPE: NT AUTHORITY\SYSTEM
	SERVICE_QUERY_STATUS
	SERVICE_QUERY_CONFIG
	SERVICE_INTERROGATE
	SERVICE_ENUMERATE_DEPENDENTS
	SERVICE_START
	SERVICE_USER_DEFINED_CONTROL
	READ_CONTROL
	WRITE_DAC
  [2] ACCESS_ALLOWED_ACE_TYPE: BUILTIN\Administrators
	SERVICE_QUERY_STATUS
	SERVICE_QUERY_CONFIG
	SERVICE_INTERROGATE
	SERVICE_ENUMERATE_DEPENDENTS
	SERVICE_START
	SERVICE_USER_DEFINED_CONTROL
	READ_CONTROL
  [3] ACCESS_ALLOWED_ACE_TYPE: NT AUTHORITY\INTERACTIVE
	SERVICE_QUERY_STATUS
	SERVICE_QUERY_CONFIG
	SERVICE_INTERROGATE
	SERVICE_ENUMERATE_DEPENDENTS
	SERVICE_START
	SERVICE_USER_DEFINED_CONTROL
	READ_CONTROL
  [4] ACCESS_ALLOWED_ACE_TYPE: NT AUTHORITY\SERVICE
	SERVICE_QUERY_STATUS
	SERVICE_QUERY_CONFIG
	SERVICE_INTERROGATE
	SERVICE_ENUMERATE_DEPENDENTS
	SERVICE_START
	SERVICE_USER_DEFINED_CONTROL
	READ_CONTROL
  [5] ACCESS_ALLOWED_ACE_TYPE: NT SERVICE\TrustedInstaller
	SERVICE_ALL_ACCESS
  [6] ACCESS_ALLOWED_ACE_TYPE: NT SERVICE\WinDefend
	SERVICE_ALL_ACCESS

Note: On Windows 10 21H2 and Windows 11 21H2, the SDDL/permissions for the Windows Defender service would look slightly different, as given below:

D:(A;;CCLCSWRPLOCRRC;;;BU)(A;;CCLCSWRPLOCRRC;;;SY)(A;;CCLCSWRPLOCRRC;;;BA)(A;;CCLCSWRPLOCRRC;;;IU)(A;;CCLCSWRPLOCRRC;;;SU)(A;;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;S-1-5-80-1913148863-3492339771-4165695881-2087618961-4109116736)S:(AU;FA;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;WD)

Hope this article helped you restore the missing Windows Defender service on your Windows 10 or Windows 11 computer.