Resolving event id 1085: group policy client-side extension error

This event indicates that the Group Policy Client-side extension was not able to successfully contact the Group Policy Service.
If you’re receiving this error, we have a couple of tips to help you resolve it.

• If you get the Windows could not start the Group Policy Client service on Local Computer.

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1. Download and install ASR Pro

2. Run a scan to find and fix errors

3. Reboot your computer for the changes to take effect

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Run the Group Policy Client-Side Extensions troubleshooter

1. To do that, open the Run accessory.
2. Enter the keyword “troubleshoot” in Run’s Open box.
   
3. Click the Troubleshoot option in Run’s left pane.
4. Click Client-Side Extension troubleshooter in Run’s right pane.
5. Click the Run the troubleshooter button.
6. Wait for the troubleshooter to run.
   

Run the SFC scan

1. Press Windows key + X to open the Power User menu.
   
2. Choose the Command prompt from the list.
3. Run the command: sfc/scannow
4. The SFC scan will now start.

Roll back Windows update

1. Update the Group Policy Service
   
2. Update the Group Policy Development Kit
3. Update the Group Policy Management Console
4. Update the Group Policy Client
5. Update the Group Policy Object Editor
   

Create a new local policy

1. Press Windows Key + R to open Run.
2. Type gpedit.msc and click OK.
   
3. In Local Group Policy Editor, go to Administrative Templates.
4. Double-click on Internet Explorer 10.
5. Select Turn off Group Policy Client-Side Extensions.
6. Finally, select Apply, then OK.
   
7. Restart your computer.

Create a new GPO

1. Navigate to User Configuration.
2. Navigate to Administrative Templates.
   
3. Go to Windows Components.
4. Open Group Policy.
5. Right-click on Administrative Templates and select Create new policy.
6. Name the policy as Logoff.
   
7. Select Enabled.
8. Now set the policy to Logoff users automatically after.

Run the MalwareBytes Anti-Malware scan

1. Download Malwarebytes Anti-Malware (MBAM) from the official website.
2. Run the downloaded file.
   
3. If MBAM asks you to update its database, update it.
4. Click Scan.
5. The scan can take a lot of time.

Create a new policy

1. Log on to the computer where Group Policy Client is installed
   Open Group Policy Management
   Expand Group Policy Objects
   Right-click Group Policy Objects
   Select New
2. Name the new policy, and select Client Computer from the Scope list.
   
3. Right-click the new policy and select Edit
4. Go to Computer Configuration > Policies > Administrative Templates > Windows Components
5. Double-click Security Settings for Microsoft Antimalware
6. Scroll down to the Protected folders page.
   
7. On the Protected Folders page, double-click the path next to Start.
8. Click Add to add the protected folder.
9. Click Add to add Program Files.
10. Click the Settings button next to the Protected Folders item.
11. Restart the computer
    

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What can I do to fix Event ID 1085 on Windows 11?

1. Verify Group Policy Client Side Extension is installed
   
2. Install and Configure Group Policy Client Side Extension
3. Reinstalling the Group Policy Client Side Extension