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Lesson 2 Identifying client upgrade paths
Objective Identify client upgrade paths for Windows Professional.

Identifying Client Upgrade Paths for Windows Server

Identify client upgrade paths for Windows 2000 Professional.
To take advantage of the new features that the Windows Professional operating system offers, you can upgrade most Windows client operating systems directly to Windows 2000.
However, you must first ensure that the computer you will be upgrading meets the Windows 2000 hardware requirements.
This is especially important when you are upgrading a large number of client computers and want to avoid any surprises.

The Hardware Compatibility List

The Windows 2000 hardware requirements will change periodically, so you should make a habit of checking the most up-to-date list of approved Windows hardware before performing an upgrade.
This list is located on Microsoft's Windows Hardware Compatibility List Web site, which you can link to from the Resources page.

Identifying client upgrade paths

Most client computers running earlier versions of Windows and Windows NT can be upgraded directly to Windows 2000. However, computers running Windows NT 3.1 or 3.5 require an additional step.
The following image lists the Windows 2000 Professional upgrade paths for client operating systems:

Windows Professional Upgrade Paths

Windows version Upgrade considerations
Windows2000 and Windows 98 You can upgrade Windows2000 and Windows 98 directly to Windows 2000 Professional. When you upgrade, all your Windows 2000-compatible programs should remain intact and functional.
Windows NT Workstation 3.51 or 4.0 Like Win9x computers, you should be able to upgrade both Windows NT 3.51 and Windows NT 4.0 machines without serious problems. However, you should confirm that your applications are compatible with Windows 2000 prior to the upgrade.
Windows NT 3.1 or 3.5 Because of significant differences between the registries of the early versions of Windows NT and Windows 2000, there is no direct upgrade path from those versions. In order to upgrade older versions of NT, you must first upgrade them to a compatible upgrade version and then upgrade the upgraded version to Windows 2000.

Upgrading Windows 2000

You cannot upgrade Windows 3.x directly to Windows 2000 Professional. You must first upgrade to Windows2000, Windows 98, or Windows NT 4.0, and then upgrade to Windows 2000 Professional.
In the next lesson, you will learn how to upgrade Windows2000 or 98 clients to Windows 2000 Professional.