Despite your best efforts of using safe printing practices, you'll end up facing the subsequent printer error Unsupported Protocol. When handling this issue you'll try one among the subsequent troubleshooting tips to urge obviate it as soon as possible.
Follow the Steps Below to Fix Printer Error Unsupported Protocol
If the primary procedure didn’t work, it’s an honest idea to vary the Print Optimizations value. Follow the above steps to try to do so.
Step 1: Press the Windows logo key + R keyboard hotkey to open the Run panel.
Step 2: Then, just type devmgmt.msc within the Run panel.
Step 3: Press Enter.
Step 4: If asked for an admin password or for a confirmation, enter the password, or tap on Allow.
Step 5: Increase Universal Serial Bus Controllers in the Device Manager.
Step 6: Find your USB port driver.
Step 7: Right-press on your USB controller driver and click on Update driver software.
Step 8: On subsequent windows, choose the Search automatically for updated drivers (connect to the web for the newest version of the drivers).
Step 9: Let the method complete.
Step 10: Finally, click OK.
Step 1: Locate the printer in Devices and Printers from the instrument panel.
Step 2: Then, right-click it.
Step 3: Select the Remove device option from the list.
Step 4: Click Yes from the Remove Device panel.
Step 5: To add the printer back, go to Settings > Devices > Printers & Scanners.
Step 6: Click the Add a Printer or Scanner button to look for nearby printers, whether they’re attached to your PC or connected to the network.
Step 7: You should see your printer’s name appear here, so click it directly.
Step 8: If you don’t see it, click the link that says The printer that I would like isn’t listed. This opens the old Add Printer dialog, which provides you the choice to scan for older sorts of printers, hook up with network printers, or add printers with custom settings.
Step 9: Then, click the subsequent button.
Step 10: Follow the instructions available on the screen to finish the installation process.
Step 11: Your printer should finally show up again within the Printers section.