This article applies to Wasp Printers and Wasp POS pole displays.
Updating from Windows 8 to Windows 8.1 can leave your hardware inoperable. Some users may not be able to print or use their pole display.
Reinstalling the drivers for your hardware should resolve the issue.
Wasp WPL Printer Driver
How to install the Wasp Pole Display
Thermal Receipt Printers: Printer Driver