Windows Vista- Can't turn on Windows Defender

Anonymous
2010-03-20T07:30:29+00:00

I TRIED TO TURN ON WINDOW DEFENDER. IT GAVE AN ERROR 0X800705B4.

WHAT DO I DO NOW?

[Original title: 0x800705b4  window defender error code]

Windows for home | Previous Windows versions | Security and privacy

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Anonymous
2010-03-20T22:34:55+00:00

Hi tropicalvic,

Let’s follow these steps which should fix the issue.

Step 1

If you have any third party antivirus software and firewall disable them temporarily and make sure that the Windows Firewall is turned on. Then check if the issue reappears.

Step 2

  1. Open Run, and  type in services.msc then press Enter.
  2. In services window, locate Windows Defender service in the services list.
  3. Verify that the Status is Started. If the Status column is blank,

right click on the service and select Start.

4 If you get error trying to force start the Windows Defender service, try to change the Startup Type to Automatic, and then restart the computer.

Hope the information helps. Please post back and let us know.

Regards

Debleena S

Microsoft Answers Support Engineer

Visit our Microsoft Answers Feedback Forum and let us know what you think.

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  1. Anonymous
    2014-12-01T07:14:55+00:00

    hi, 

       same error code...windows defender services is running and is in automatic mode. still could not turn on windows defender. please give some solution.

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  2. Anonymous
    2014-08-13T00:58:56+00:00

    I have the same problem as tropicalvic. 

    Windows defender isn't in the services window, so i'm unable to start the programme here. I've been trying to uninstall the MCAfee product, but it still accours and is STILL RUNNING as I can see in the services window, but I'm unable to stop it.

    Download and run the McAfee removal tool:

    See this Wiki article: List of anti-malware product removal tools

    And see the following:

    Windows Defender on Windows 8 - Introduction and Frequently Asked Questions 

    Defender not starting after removing prior a/v -- Win8: http://answers.microsoft.com/en-us/protect/forum/protect\_defender-protect\_start/windows-defender-wont-start-in-windows-8-after-a/c5fdc22d-3b62-44cc-8485-4a3955b8985a

    -steve

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  3. Anonymous
    2014-08-12T11:21:15+00:00

    I have the same problem as tropicalvic. 

    Windows defender isn't in the services window, so i'm unable to start the programme here. I've been trying to uninstall the MCAfee product, but it still accours and is STILL RUNNING as I can see in the services window, but I'm unable to stop it.

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  4. Anonymous
    2014-05-02T02:55:31+00:00

    I am also facing the same problem, but even after following above description I found the WinDefender is running but cannot turn on the real-time protection. What to do? I am using win8.1

    Please start your own new question with details about your PC and the problem being encountered.

    How to ask a question in forums:

    http://support.microsoft.com/kb/555375

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