1. #1
    Unregistered

    Cannot turn on Windows Defender in Windows Vista

    Each time I try to enable Windows Defender on my PC running on Windows Vista, I keep getting the error message “Windows Defender is turned off by Group Policy; see your system administrator to enable Windows Defender via Group Policy”. What should I do to overcome this issue?



  2. #2
    expert Array
    Join Date
    May 2012
    Posts
    1,791

    Re: Cannot turn on Windows Defender in Windows Vista

    Scan your PC with any powerful Antivirus and check whether it is infected with disruptive virus. You can start up the Windows Defender without any problem after removing the virus. If you can’t find any malicious virus, then try to modify the registry. Back up the registry before doing this for protection. Follow the procedures given below to accomplish this.
    • Hit the ‘Start’ button and type regedit into search field
    • Press ‘Enter’ key and provide administrator password or confirmation while prompted
    • Locate the key or sub key you wish to back up and click on it
    • Click on the ‘File’ menu and select ‘Export’
    • Choose the location where you save the back up from the ‘Save in’ box
    • Type in the back up file name on the ‘File name’ box and click ‘Save’ option
    Repeat the two steps given above first to modify the registry. Navigate into HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Win dows Defender afterwards and erase the value set up for DisableAntiSpyware. Try to turn on Windows Defender after closing the registry editor and check whether the issue still persists.

  3. #3
    raj_tiwary007 Array
    Join Date
    Oct 2012
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    86

    Re: Cannot turn on Windows Defender in Windows Vista

    Dear

    Uninstall Windows Defender,
    Click Start, click Run, type appwiz.cpl, and then click OK.
    Click Windows Defender, and then click Remove.
    Follow the prompts to uninstall Windows Defender.
    To reinstall Windows Defender, visit the following Microsoft Web site
    http://www.microsoft.com/windows/product…

    For detailed information & methods to resolve the problem,
    http://support.microsoft.com/KB/931849

  4. #4
    raj_tiwary007 Array
    Join Date
    Oct 2012
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    86

    Re: Cannot turn on Windows Defender in Windows Vista

    Dear


    First of all

    AntiVirus Program have to Uninstall which is already installed you System like AVG, MCafe, Norton etc.
    permanently and install Microsoft Security Essentials. It will replace Window Defender and your AV.
    http://www.microsoft.com/security_essentials/?mkt=en-us

  5. #5
    raj_tiwary007 Array
    Join Date
    Oct 2012
    Posts
    86

    Re: Cannot turn on Windows Defender in Windows Vista

    Dear


    Firstly AntiVirus Program Uninstall in your System.
    and
    Watch & Do steps as per video shows.
    http://www.youtube.com/watch?v=gnplDRVts7M

  6. #6
    raj_tiwary007 Array
    Join Date
    Oct 2012
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    86

    Re: Cannot turn on Windows Defender in Windows Vista

    Dear

    Tools > options.


    1. In the Start Menu Search Box () typemsconfig and press enter on your keyboard.
    2. The System Configuration utility will open and you will see a screen similar to the one below.
    Look in Startup.


    Disable your Anti-virus > set your Programs through Defender > Re-enable your AV

  7. #7
    raj_tiwary007 Array
    Join Date
    Oct 2012
    Posts
    86

    Re: Cannot turn on Windows Defender in Windows Vista

    Dear

    Some AV's interfere with Windows Defender and tell you during setup to disable it


    Try a system file check

    Open an elevated CMD and type:

    sfc /scannow


    Press enter let it scan, if any system files are missing or damaged, windows will repair / replace them


    Also have a look in the system event logs, see if it give a clue as to that is stopping defender starting up

  8. #8
    RONAK AGRAWAL Array
    Join Date
    Oct 2012
    Posts
    119

    Re: Cannot turn on Windows Defender in Windows Vista

    Friend,
    you can not just install group policy in windows home version.
    Home versions do not have it.

    If you are using microsoft security essentials, avg, norton, mcafee, avira etc they disable the vista version of windows defender by default.

    Microsoft security essentials has its own version of windows defender,

    and other anti-virus programs use their own particular type of spyware and malware application scanner.

    It is nothing to worry about and is the default action that is designed for them to do.

  9. #9
    balu Array
    Join Date
    Jun 2012
    Posts
    80

    Re: Cannot turn on Windows Defender in Windows Vista

    Dear friend,

    I think your antivirus might have disabled the windows defender.
    Some antivirus have these non-compatibility issues. There is no need to worry.

    If there is antivirus in the system it is enough.
    Windows defender is provided by Microsoft but if never catches any virus.

  10. #10
    Jam Array
    Join Date
    Oct 2012
    Posts
    156

    Re: Cannot turn on Windows Defender in Windows Vista



    First of all OFF the Windows Defender.

    Then go to the window start and open it.

    Now select the "run command" and then type the "regedit" option and open it.

    Because you need to some changes in the registry.

    Once it opens, locate the "HKEY_LOCAL_MACHINE\Software\Policies\Microsof t".

    Now here you see the "Windows Defender" option from it.

    Then you have to remove the value which is set in the disable Anti-spyware.

    And you allow your window for restart.

    This will fix the "Windows Defender" problem OK.


  11. #11
    mohan123 Array
    Join Date
    Oct 2012
    Posts
    433

    Re: Cannot turn on Windows Defender in Windows Vista

    Hii Friends..




    To overcome this problem follow these steps..


    Right click command prompt Run as administrator.


    Type one command "winmgmt/verifyrepository


    If the system returns "wmi reposity is not consistent" run this command




    First time you run it will be fail so Execute again..


    Now it will take Couple of minutes for the services shutdown..




    Run the command again You actually may have to run it 3 times before it finally runs and completes on its own.




    Now reboot your system..




    If the above step does not working please try below steps..




    Right click command prompt run as adminstrator


    Type the following command..


    "Net stop winmgmt"


    Press Y and press enter to continue




    "cd%windir%\system32\wbem"


    ren repository repository.old


    net start winmgmt

    I hope it will help full you..

    Thank you and All the best..

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