Navigate to the computer's Start Menu, then select the Keystroke Update
Installer from the Keystroke program group . Select Keystroke Extensions and then KeyPay to download KSSvcSetup.exe and install the KeyPay Service.
When the installation begins, follow the on-screen instructions in the KeyPay Service Setup program. It is strongly recommended to accept the installation folder location suggested by the setup program (which is the Keystroke program installation folder, typically C:\Keystroke).
See:
KeyPay - General Information
KeyPay Requirements
Where to Install KeyPay Software
Setting Up the KeyPay Service
Configure Authorization Method to work with KeyPay Service
Testing KeyPay
Using KeyPay