The installer package "gpg4win-4.1.0.exe" is not signed.
file => https://files.gpg4win.org/gpg4win-4.1.0.exe
This results in a windows system-warning when starting the installation.
{F4474764}
{F4474779}
The installer should be signed as version 4.0.4 was...
{F4474786}