Windows Defender 0x800106ba Service Error on Automatic Startup

Hi Anon,
The 0x800106ba error may occur after Windows Defender is updated due to the computer's inability to update the Windows Defender firewall. It may not have applicable permissions needed for the update, or it may not have the files necessary for updating itself.

The Fix

Set Windows Defender to Automatic - You can set the Windows Defender service to Automatic, Disabled or Manual. Setting it to automatic might solve the problem. Follow these steps:

1. Click Start > type services in the Search box > click Services in the Programs list.
2. If you are asked for a Password before you continue, then enter the password > click Continue.
3. Double-click Windows Defender, and click Automatic in the start-up box > click OK.

Uninstall and reinstall Windows Defender - If the first procedure did not help resolve the problem, try un-installing and then reinstalling Windows Defender. Due to the fact that Windows Defender is a Windows component, we will use AppWiz to un-install it from the computer. Follow these steps:

1. Press Windows Key + R > type appwiz.cpl > Press Enter
2. Click Windows Defender > click Remove
3. Follow the prompts to uninstall Windows Defender

Let me know how you go!

At the startup of Windows XP, you may see an error that says "Unable to Start Windows Defender service". This issue occurs, if some of the registry entries are corrupted. Restarting the service from the service console may also prompt the same error.

To resolve this issue, you may need to uninstall and reinstall the Windows Defender. Follow the below mentioned steps:

1. Click Start, Control Panel.
2. Click Add or Remove Programs.
3. Click Windows Defender, and click Remove.

This will uninstall Windows Defender. You can download and reinstall the updated version from the following link:

http://www.microsoft.com/athome/security/spyware/software






Hope this helps!!! Let me know if you need more help


-Nadeem

See the link below for solution. It has all steps required to resolve this issue. You will have to download latest version of Windows Installer and then uninstall and reinstall the Windows Defender utility.

http://techtake.net/2010/07/07/windows-defender-error-0x80070003/

Follow the below steps.
1) Go to Start-->Setting--> Control Panel--> Administrative tools-->Services

2) Then locate Windows Defende and double click it

3) Select "startup type" as automatic

4) Then click "log on" tab

5) click "Local System account" and check the only check box available.

6) Click the "recovery" tab and make sure Windows Defender tries at least two times to
start
7) Now, click the "General" Tab and click "start"