Why does the Safe Surfer Windows app installer say, "This app package's publisher certificate could not be verified"?

The Safe Surfer Windows app installer might mention, "This app package's publisher certificate could not be verified", if you have a very old version of the installer. You can resolve this by downloading the latest version of the Windows app by visiting the Windows app download page (https://safesurfer.io/windows).

Updated on: 27/09/2026