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Windows Defender Update Problem

Anonymous
2018-12-31T01:07:44+00:00

I've been trying to update my windows defender for a while now,all it does is download the update but does not complete the installation process. It says there was a problem with the network even when the network is working just fine, then requires ,me to re-download which I do but end up encountering the same problem of it not completing the installation even after finishing the download.Help anyone?

[Original Title: windows defender]

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.

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  1. Anonymous
    2018-12-31T08:36:59+00:00

    Hi Chomba-121,

    Ensure that the date & time is set correctly on your PC.

    You can try purging the WD definition cache, in case some corruption exists there.

    At a command prompt (admin) enter the following command.

    %programfiles%\windows defender\MpCmdRun.exe -removedefinitions -all  < enter >

    You can also request definition updates from within command prompt.

    %programfiles%\windows defender\MpCmdRun.exe -signatureupdate -http  < enter >

    exit  <enter >  To leave cmd prompt.

    If corrupted data should exist in your cache, this should give you some relief.

    Regards,  Glen

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  2. Anonymous
    2019-01-02T07:21:34+00:00

    Hi Chomba-121,

    I am glad that WD is working OK for you now. But I am sorry that my suggestion

    did not work for you. It is a tip that I picked up, on this forum a while back, from

    one of the most respected posters around. My PC gives the same error message.

    It obviously had nothing to do with your success.

    The description of this procedure is described here: https://docs.microsoft.com/en-us/windows/security/threat-protection/windows-defender-antivirus/command-line-arguments-windows-defender-antivirus

    There must be something wrong with the syntax on the command that I gave you.

    Regards,  Glen

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  3. Anonymous
    2018-12-31T20:15:15+00:00

    I've been trying to update my windows defender for a while now,all it does is download the update but does not complete the installation process. It says there was a problem with the network even when the network is working just fine, then requires ,me to re-download which I do but end up encountering the same problem of it not completing the installation even after finishing the download.Help anyone?

    [Original Title: windows defender]

    I WANT YOUR HELP MY WINDOW IS NOT BE A UPADATE 

    PLS TELL HOW TO UPADATE WINDOW

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  4. Reza-Ameri 45,816 Reputation points Volunteer Moderator
    2018-12-31T18:20:46+00:00

    Are you able to update Windows?

    Try restart your PC and run Windows Update again.

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