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

Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.

0 comments
Answer accepted by question author
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.

Was this answer helpful?

50+ people found this answer helpful.
0 comments

99 additional answers

Sort by: Newest
Most helpful Newest Oldest
  1. Anonymous
    2011-07-10T08:57:35+00:00

    my windows defender is all ready in Automatic.... and restar my computer not change my error 0x800705b4

    Was this answer helpful?

    0 comments
  2. Anonymous
    2011-05-04T11:10:31+00:00

    Hi ibrahimpatel,

    ·         Do you have any third party antivirus program installed on your computer?

    ·         Did you make any changes on your computer prior to this issue?

    Let’s follow these methods and check if it helps.

    Method 1

    If you have any security software installed, disable them temporarily & check if the issue persists.

    Note:   Ensure to enable your anti-virus back on the computer after you finish these steps.

    Refer:  Disable antivirus software

    Method 2

    You may follow this link and check if the issue persists.

    Troubleshooting Windows Defender

    Method 3

    If above methods doesn’t help, you may run system file checker [SFC] scan on the computer which will replace the missing or corrupt files & check if the issue persists.

    a. Type ‘cmd’ in the Start Search box. Right click on cmd in the Program list and then select the option Run as administrator.

    Note: If you are prompted for an administrator password or for confirmation, type your password, or click Continue.

    b. Type the following command, and then press ENTER:

    sfc /scannow

    For more information refer this link.

    How to use the System File Checker tool to troubleshoot missing or corrupted system files on Windows Vista or on Windows 7

    Hope the information helps.

    Please post back and let us know.

    Was this answer helpful?

    0 comments
  3. Anonymous
    2011-05-04T04:38:58+00:00

    when I click on start,it starts and then does'n finish run and I got system message ,window defender start but stop.

    Was this answer helpful?

    0 comments
  4. Anonymous
    2011-05-03T20:08:00+00:00

    hi

    if you need to change startup programs read this information about the other methods to do that without using defender

    using msconfig read this tutorial:

    How to use MSCONFIG in Windows Vista

    Here is how to use MSCONFIG in Windows Vista to disable some of the unnecessary programs that automatically load on start-up

    http://netsquirrel.com/msconfig/msconfig_vista.html

    and also try this FREE program, Autoruns:

    This utility, which has the most comprehensive knowledge of auto-starting locations of any startup monitor, shows you what programs are configured to run during system bootup or login, and shows you the entries in the order Windows processes them. These programs include ones in your startup folder, Run, RunOnce, and other Registry keys. You can configure Autoruns to show other locations, including Explorer shell extensions, toolbars, browser helper objects, Winlogon notifications, auto-start services, and much more

    http://technet.microsoft.com/en-us/sysinternals/bb963902

    Was this answer helpful?

    0 comments