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
    2010-04-11T18:55:48+00:00

    Hi Debleena

    I cant turn Defender on and I also get 0x800705b4

    It first started when I loaded up a trial version of AVG which I have now uninstalled.

    I followed you advice above but it still doesnt work Just says "Windows defender started and then stopped. Some programs automatically stop when not used by another program"

    Any help?

    Cheers

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  2. Anonymous
    2011-01-26T13:08:33+00:00

    SAME EXACT happens to me..I'm still trying to find the solution.

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  3. Anonymous
    2011-04-08T19:20:41+00:00

    This is happening to me. Never had any problems untill I just reformatted my Vista for the second time and when I went to try to edit my startup programs it told me I have to turn on defender and I get this message everytime I try.

    I JUST completely reformatted my comp and updated it to service pack 2. It should be a completely clean PC. I don't understand how this is happening. I am about to do bad things to my computer.

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  4. Anonymous
    2011-04-08T19:22:33+00:00

    Same exact thing is happening to me after I just reformatted my vista for the second time and updated it to service pack 2. My computer will not let me get in to edit my start up programs because of this. The computer was freshly reformatted, it should be a clean and fresh PC. I dont understand why this is happening.

    Sorry for double post. The original didnt show up to me at first.

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