On the printer control panel, go to Setup or Settings. Look for Printer Maintenance or Printer Update. Select Update Printer ...

If you see error 0x6100004a on your HP printer, follow this guide for comprehensive methods to fix the error.

Printer Command Language (PCL) is developed by HP for its inkjet printers. PCL 6 is also known as PCL XL. PCL XL is a powerful driver that is used to print documents on inkjet printers.