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Windows Defender wont start error 577


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#1 diggiedo

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Posted 07 November 2015 - 07:46 AM

Don't know what this is all about but any help would be great. ty in advance.


Edited by Queen-Evie, 07 November 2015 - 09:10 AM.
moved from Windows 10 Support to the appropriate forum


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#2 quietman7

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Posted 07 November 2015 - 09:43 AM

These types of errors on Windows Defender 8/10 are typically the result of having a third-party anti-virus installed or failure to remove it properly (completely).

Windows 8/10 integrates a more robust version of Windows Defender[/url] (and uses that name) for its anti-virus and anti-malware protection.

Since Windows 8/10 Defender includes anti-virus protection, it typically is disabled by the installation of a third-party anti-virus program. If a trial anti-virus (i.e. McAfee, Norton, etc) came preinstalled on your computer or you installed one, it most likely turned Windows 8 Defender off (disabled) to avoid conflicts. Windows 8 Defender will remain disabled until that 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.
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