Operation Manual

For best results, you should connect the printer directly to the computer’s USB port. If you must use
multiple USB hubs, we recommend that you connect the printer to the first-tier hub.
Windows operating system
Your computer must have one of the operating systems supported by this printer pre-installed, or be a
model upgraded from Windows XP, Vista, Server 2003, or Server 2008 to an operating system
supported by this printer. You must not be able to install or run the USB printer driver on a computer
that does not meet these specifications or that is not equipped with a built-in USB port.
For details about your computer, contact your dealer.
Printer software installation
Incorrect or incomplete software installation can lead to USB problems. Take note of the following
and perform the recommended checks to ensure proper installation.
Checking printer software installation
When using Windows, you must follow the steps in the Setup Guide packed with the printer to install
the printer software. Otherwise, Microsoft’s Universal driver may be installed instead. To check if the
Universal driver has been installed, follow the steps below.
1. Open the Printers folder, then right-click the icon of your printer.
2. Click Printing Preferences on the shortcut menu that appears, then right-click anywhere in the
driver.
If About is displayed in the shortcut menu that appears, click it. If a message box with the words
“Unidrv Printer Driver” appears, you must reinstall the printer software as described in the Setup
Guide. If About is not displayed, the printer software has been installed correctly.
Note:
For Windows Vista, Vista x64, XP, XP x64, Server 2003, or Server 2003 x64, if the software installation
dialog box appears during the installation process, click Continue Anyway. If you click STOP
Installation, you will have to install the printer software again.
Epson AcuLaser C9300 Series User's Guide
Troubleshooting 168