Exchange 2013 Setup Error: setupui.exe – CLR20r3

Issue

Error when lauching the Exchange 2013 setup. setupui.exe crash with a reference to CLR20r3

1

2

Cause

A firewall state could cause that problem. In my case a GPO setting was the problem.

3

Workaround

Desactivate the GPO or reactivate the firewall, and voila the setup should start.

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