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Jeff23

Windows Update\Defender stopped running, can't install Malwarebytes

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Maybe your account is having permission issues.. Try the hidden Admin account, see if that makes any difference..

Select Windows key and X key together, from the list select "Command Prompt (Admin)"

At the prompt type or copy paste net user administrator /active:yes select enter.

Close out and reboot, you will see a new account "Administartor" select it and follow the prompts through.

When that account is set see if you can merge WinDefend.reg

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I successfully activated and logged into the admin account but trying to merge the reg file gave the same error.

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Thanks for the update, we need to close out that special account for now....

Select Windows key and X key together, from the list select "Command Prompt (Admin)"

At the prompt type or copy paste net user administrator /active:no select enter.

Close out and reboot.

Next,

Open Regedit, select this key "Hkey_Current_User" then select "Edit" then "Permissions" In the new box select your user account that has admin status.. Does "Full Control" show as allowed..?

Next,

Highlight this key "Hkey_Local_Machine" then select "Edit" then "Permissions" In the new box that opens select the Administrator account... Does "Full Control" show as allowed..?

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Hello Jeff23,

Those permissions are exactly as they should be, so we are just not finding the problem... If this was my PC I would now go for a system refresh, that is all your personal stuff would be saved and Windows reinstalled.. Unfortunately any programs/software you`ve installed yourself would be lost and need to be reinstalled. How do you feel about that option...??

Kevin...

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Well, I guess if that's  the only option left I don't really have a choice...

I'm not sure what it means when it says it will keep my "personal files" though. What about, say, a game installed to C:\Folder_I_Made\Game\ or media files in C:\Movies\ ? I'm not clear on how it determines between a "program you installed" vs. a "personal file."

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Does Malwarebytes prevent windows defender anti virus from running?

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You are using the free version of Malwarebytes, that should have no effect on WD. I personally have the premium version of Malwarebytes, it runs without issue, as does WD...

Have a read at the following link regarding System Refresh: https://www.tenforums.com/tutorials/4090-refresh-windows-10-a.html

One other point, maybe worth having a look at system restore, are there any restore points available pre this problem starting...

https://support.microsoft.com/en-us/help/12415/windows-10-recovery-options

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There's a restore point on Jul 2 with the description "windows update" so I guess that was before the update problem, I don't know if that's before or after the windows defender problem... I'm assuming they happened at the same time. I guess it's worth trying...

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well... I did the restore and Update and Defender were working again. So I did a Windows Update and restarted and... Update stopped working and Defender disappeared again...

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Well at least we know its the update causing the problem, can you check that in History.. Open start > settings > update and security > view update history. What is the last update history id number...

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Well I don't think the last update will tell you anything because I got update working again the same way as last time and continued the updates. But here's the history that shows up, you can see where it failed.

history.png

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Probably the best option now is to take this to the Microsoft Community, explain the problem with Defender after the update. Also give link to this thread...

https://answers.microsoft.com/en-us

I`m sure those guys who are specific to Windows will have an answer for you. Can you let me know outcome please...

Thank you,

Kevin...

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Alright, well I appreciate you taking the time. Thanks for the help.

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You`re very welcome Jeff23,

Windows updates and negative outcomes are not my strongpoint, i`m sure the answer will be avaiable for you at MS community. Please let me know the outcome...

Regards,

Kevin...

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