Older Tysso drivers (pre-2019) lack a Microsoft digital signature. Windows 10 may block installation.
The official driver for the Tysso PRP-085IIIT receipt printer is provided by the manufacturer, Fametech Inc. It is compatible with Windows 10 and can be found in the PRP-085 Printer Driver Package Download & Installation Steps : Obtain the latest driver archive ( prp08x_driver.zip ) from the Official Tysso Download Center Tysso Prp-085iiit Driver Download Windows 10