Xerox 6400 - Manual (Page 11)

Installation
6 Xerox 6400 Scanner User’s Guide
3. On the installation menu, select Install Products.
4. Click in the boxes for Scansoft PaperPort and Scanner
Driver,
If you want to also install the other software, click their boxes as
well.
5. Click Install Now.
6. On the PaperPort 9.0 Welcome window, click Next.
Installing PaperPort 9.0 will uninstall any previous, existing
version of PaperPort and install PaperPort 9.0 while retaining
all of your PaperPort files.
7. On the License Agreement window, read the ScanSoft license
agreement. If you accept the terms, select I accept the terms
in the license agreement, and then click Next.