Architectural Changes since Windows NT 4

Windows 2000 and the Windows Server 2003 family introduce numerous architectural improvements as well as some changes to the way Windows domains work. The following sections discuss the changes that are relevant to upgrading: the types of server roles available and the type of domain trusts that are used; new support for devices; Plug and Play (PnP); Power Management; and of course, the addition of the Active Directory service.

Because of all these changes, Windows 2000, Windows XP, and Windows Server 2003 systems have some compatibility problems, especially when trying to use Microsoft Windows 95, Windows 98, and Windows Me applications or device drivers. Windows XP and the Windows Server 2003 family ...

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