For Windows 98 Users - Epson PERFECTION 1640 SU Reference Manual

EPSON Perfection 1640 appearing under Imaging Device with
an exclamation (!) mark:
Note:
Screen shots of Windows 98 are used here for illustration.

For Windows 98 users

If EPSON Perfection 1640 appears under Other devices with
a ? mark
Note:
Make sure your scanner is turned on and connected to your computer.
If your scanner is turned off or not connected to your computer, you
cannot reinstall the driver properly.
Maintenance and Troubleshooting
6-35