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I'd like to install manually .Net FrameWork 4.6.1 security update that releases most recently.

When I try to install that update I gave this error:

Software update kb3136000 has not been installed because:
A certificate chain could not be built to a trusted root authority.

After I googled this error I found this: A certificate chain could not be built to a trusted root authority, however, when I used the Certmgr.exe command in Developer Command Prompt for Visual Studio I got this error:
Certmgr.exe is not recognized as an internal or external command.

Any helps appreciated.

2

I found the solution. I downloaded this certificate and doubled click on it and try to install it to Trusted Root using wizard.
After that, I could run that update (KB3136000).

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