I’ve recently published an article saying how to install Microsoft XPS Viewer, but have just found that this is not relevant for Windows Server 2012. If you try to install Microsoft XPS Viewer with the Microsoft XML Paper Specification Essentials Pack on a Windows 2012 Server, you will get the following error message:
Windows Update Standalone Installer
Installer encountered an error: 0x80096002
The certificate for the signer of the message is invalid or not found.
This is because the XPS Viewer is now bundled as a feature on Windows Server 2012. To install Microsoft XPS Viewer on Windows Server 2012, go to the Server Manager, click Add Roles or Features and follow the wizard to install the XPS Viewer feature.