Issue: Viewer crashes at installation time whilst checking installed license

An additional dialog will be displayed with the message ‘PDFViewer has encountered a problem and needs to close‘. 

This occurs if you are not logged on as a Windows Administrator during installation time.  The installation program needs to write to the Windows registry.  You need to be logged as a Windows Adminstrator to install the viewer software.

If you are logged on as a Windows Administrator then:

  • close down all other applications on your computer before attempting to register again (including firewall and anti-spyware/virus applications);
  • make sure Windows is up to date with all relevant patches, drivers, and service packs;
  • un-install and then re-install the Viewer application.