The Windows Certificate Propagation Service is a component of the Windows Operating Systems that enables users to log in to their computer with Smart Cards. Very few companies and almost no individuals use this feature of Windows. This service interferes with the operation of the NFC reader. When enabled, it slows down and sometimes disrupts the communication to the NFC reader, making the GoToTags Encoder and GoToTags Windows unusable. The GoToTags software attempts to stop this service on startup; sometimes it is unable to stop the service. If this happens you can manually stop the service using the Windows Services control panel. It’s best to both stop the service and set it’s startup type to disabled such that when you next restart the computer it wont start up again.
In Windows 8 & 10 if an NFC reader is plugged into a different USB port the service will re-enabled itself at start up again; quite annoying.