Installation is a choreography: connect the printer (USB, serial, Ethernet, or Bluetooth), ensure the OS recognizes it, run the installer as administrator if required, and follow any vendor instructions for port settings and baud rates. After installation, verify with a test page and a simple print from the POS software. If the receipt appears with incorrect characters or misaligned text, toggling encoding (e.g., UTF-8 vs CP437), line spacing, or paper-size settings often fixes the display. For stubborn cases, consult the printer’s manual for command-set references (ESC/POS commands are common) and compare what the POS app sends versus what the printer expects.