If you want to install the native messaging host for all users, change HKEY_CURRENT_USER to HKEY_LOCAL_MACHINE when creating the registry key It creates a registry key: HKEY_CURRENT_USER\SOFTWARE\Google\Chrome\NativeMessagingHosts\ca.psiphon.chromeand sets its default value to the full path of host\ca. This script installs the native messaging host for the current user Run the install_host.bat script in the tools directory