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Windows Defender


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#1 ghost whistler

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Posted 29 September 2015 - 01:48 PM

I have just uninstalled Avast Antivirus and can't get Windows Defender to run. It tells me it has been deactivated and there's no way to turn it on. If I go to the security panel, all the related options are greyed out. If i go in the Security and Maintenance in the Control Panel it lists what apps I have and still lists both Defender and Avast with no available option to choose either. What can i do? I've tried running Defender as admin (which I am as the only user anyway) and still it tells me it's been deactivated.


Edited by hamluis, 29 September 2015 - 02:01 PM.
Moved from Win 10 Support to AV/AM Software - Hamluis.


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#2 quietman7

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Posted 30 September 2015 - 07:49 AM

Windows 8/10 Defender will remain disabled until all remnants of a third-party anti-virus software has been completely uninstalled. In some cases, you may need to download and run the anti-virus vendor's clean up tool to remove any remaining remnants...then Windows 8 Defender needs to be activated if you choose to use it.avast_clear_safemode.png

When uninstalling the third-party anti-virus you may receive a message indicating your system has no protection...click here to turn on Windows Defender. If not, and Defender remains disabled, you will need to manually turn it on.
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