The following issue applies to the Windows 2000 Server operating systems:
When Remote Installation Service is installed on your Windows 2000 server, SIS (Single Instance Store) is also installed. The driver for SIS (sis.sys) conflicts with the iFolder client filter driver (niffltr.sys). You must uninstall one of these two programs; otherwise, your users' workstations will not reboot during the iFolder client installation process and you will get an error message indicating that the two drivers conflict with one another.