Connecting two local usb printers

Customer was trying to connect two local printers via usb ports.  Had him unplug one printer.  Deleted drivers for the printer that was still attached. Rebooted so the drivers for the first would install properly.  Tested the printer.  Asked him to plug in the second printer.  Gave the drivers time to load.  Tested the second printer.  Had him log in and test both printers.  Both worked fine.