To install the driver on Windows 10 (64-bit), you should first attempt to use the official TVS Electronics Product Support page. If a dedicated "Champion XL" driver is not listed for Windows 10, the printer's support for IBM Proprinter XL 24E and ESC/P2 emulations allows you to use built-in Windows drivers as a reliable alternative. 1. Download Official Drivers
"Add a local printer or network printer with manual settings." If using a USB-to-Parallel adapter, select the Virtual USB printer port (e.g., USB001). If using a physical parallel port, select Choose Driver Windows Update to refresh the list of manufacturers. Look under TVS Electronics (if available) or Generic / IBM Graphics 9pin Epson FX-80 / FX-100
The MSP 345 is a warhorse. But Windows 10 doesn't speak its language. The manufacturer stopped supporting it when the world moved to inkjets.