Net Integrator Patch for Windows XP Registry. In order for the Net
Integrator, acting as a primary domain controller, to properly recognize Windows
XP logins, you must install this patch. From the XP machine, simply click
on the link above and when prompted, choose "open". The select "yes" when
prompted if you want to install this registry patch.
For more information on the latest features available in Samba as a domain
controller, download this PDF: [Samba