The publisher of the package is not displayed correctly during an install (on some windows installation and browser). So the user account control (UAC) dialog, when a user wants to install gpg4win just shows that the creator of the package is unknown.
The problem only occurs on some windows installations and with some browsers after opening the Gpg4win 3 installer after downloading it.
Reproduced with Webbrowsers Firefox and Iridium (a chromium build) on
* Windows 7 DE, 64 bit
* Windows 10 HOME, 64 bit
* After inspection of the security details of the file (e.g. via the explorer, file properties) the problem goes away for this installation. (**<- Workaround**)
* Using the webbrowser Internet Explorer it works right away.