After July 13th, there will no longer be any security updates or assisted support and users will be completely on there own. Additionally, Windows 2003 Server will move from "Mainstream Support" to "Extended Support" and will become unsupported in 2015.
Windows 2000 is currently in SP4, and has had all of its other service packs retired in the past decade. Users are encouraged to upgrade, even just to XP SP3. XP Service Pack 2 users are encouraged to update to SP3 (which is free), Vista or 7.
Written by: Andre Yoskowitz @ 8 Dec 2009 14:52