How do I reset my HP Ink Tank Wireless 410 if I'm still getting the 'E2' error?

Try a power reset. Turn the printer off and unplug it from the power outlet. Wait for at least 60 seconds. Then, plug the printer back in and turn it on. This often resolves temporary glitches that might be causing the error. If that doesn't work, consult the printer's manual for a hard reset procedure, which may involve holding down specific buttons during startup.