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I had this error when opening windows firewall with advanced security:

There was an error opening the windows firewall with advanced security snap-in. 
Error code: 0x6D9

What is the best way to solve this?

1 Answer 1

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The Microsoft automatic diagnoser and fixer fixed it (seemed to be some kind of printer conflict in my case):

In case the link breaks, the following might be good search terms:

Microsoft Automatically diagnose and fix problems with Windows Firewall
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  • @SkyRamon Fair enough & understand. In my case the search terms (firewall, snap-in, 0x6D9 etc) did not give an answer - hence even a downvoted answer such as this would have saved me time.
    – Lee
    Feb 24, 2017 at 19:20

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