<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN" "http://www.w3.org/TR/REC-html40/strict.dtd"> <HTML DIR="LTR"> <HEAD> <META HTTP-EQUIV="Content-Type" CONTENT="text-html;charset=Windows-1252"> <TITLE>Compatibility Details</TITLE> </HEAD> <BODY BGCOLOR="#ffffff"> <FONT FACE="verdana" SIZE="2"> <P> Microsoft Windows XP Setup has detected that both this computer (a backup domain controller) and your primary domain controller are running Windows NT 4.0 or an earlier operating system. </P> <P> Before you upgrade the backup domain controller to Windows XP, you must upgrade the primary domain controller. </P> </FONT> </BODY> </HTML>