Epson AcuLaser C9100 Reference Manual page 293

Checking printer software installation for Windows 2000, XP,
or Server 2003
When using Windows XP, 2000, or Server 2003, 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 2000, if the Digital Signature Not Found dialog box
appears during the installation process, click Yes. If you click No, you
will have to install the printer software again.
For Windows XP or Server 2003, 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.
Checking printer software in Windows Me and 98
If you canceled the plug-and-play driver installation in Windows
Me or 98 before the procedure was complete, the USB printer
device driver or the printer software may be incorrectly installed.
Follow the directions below to ensure that the driver and printer
software are installed correctly.
Troubleshooting
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