GPG4win
From WPKG | Open Source Software Deployment and Distribution
GPG4win
<package id="GPG4Win" name="GPG4Win 1.10" revision="1" priority="35 reboot="true"> <check type="uninstall" condition="exists" path="GnuPG For Windows" /> <install cmd='%SOFTWARE%\GPG4Win\gpg4win-1.1.0.exe /S' /> <upgrade cmd='%SOFTWARE%\GPG4Win\gpg4win-1.1.0.exe /S' /> <remove cmd='%ProgramFiles%\GNU\GnuPG\gpg4win-uninstall.exe /S' /> </package>