Epson Perfection 640U Reference Manual page 94

During Windows 2000 installation
If a dialog box similar to the one shown below appears and asks
for the updated files for your scanner while you are installing
Windows 2000, click Next and continue installation. Do not click
Provide Files....
Note:
If you insert the Scanner Software CD and click Provide Files..., an
error message may appear. Replace the scanner software CD with the
Windows 2000 CD-ROM and continue installing Windows 2000. After
finishing the Windows 2000 installation, you need to uninstall your
scanner from the Device Manager and reinstall EPSON TWAIN.
Follow the instructions "Recovering from Scanner Software Installation
Problems on Windows" on page 5-21 to uninstall EPSON TWAIN.
5-20
Maintenance and Troubleshooting