Your existing Microsoft fax application will not work after upgrading to this version of Microsoft Windows. Uninstall this fax application using Add/Remove Programs in Control Panel, and then restart the upgrade. 

After installing Windows, add a fax printer connection to reconnect to the Fax Server, and use Microsoft Windows Fax to send and receive faxes using this connection. 

For a list of software supported by this version of Windows, see the Microsoft Windows Compatibility List at http://go.microsoft.com/fwlink/?LinkId=9946.