I care more about the people my students become than the scores on the tests they take.
Use the "Have Disk" method:
The base XP-420B is USB only . For network printing, you need the XP-420B Ethernet model or plug it into a USB print server (like a TP-Link print server). Driver Xprinter Xp-420b Windows 10
The driver usually comes in a compressed .zip or .rar file. Use the "Have Disk" method: The base XP-420B is USB only
If the automatic installer fails (or you only have INF files): Driver Xprinter Xp-420b Windows 10