Mastering POS Printer Driver Setup: A Guide to V7.17 and Avoiding "Fake Link" Traps
Look at the sticker on the bottom of the device. Does it say "Epson TM-T20III," "Xprinter XP-58II," or "Bixolon SRP-350"? V7.17 is a generic class driver ; you may actually need a specific variant.
Have a printer that still won't work after V7.17? Drop the exact error code in the comments below.