Test on another computer. If it prints slow when connected to a different PC, then it's likely faulty.
If that's not an option, you can try uninstalling the software/drivers using Add and Remove programs, reboot, and reinstall the software/drivers.
You could also try a different USB cable.
If that's not an option, you can try uninstalling the software/drivers using Add and Remove programs, reboot, and reinstall the software/drivers.
You could also try a different USB cable.