Performing an Upgrade Installation
Upgrading an existing Windows installation to Windows XP Professional is a fairly straightforward and simple task. Windows XP Professional supports upgrades from the following operating systems; this is the first step of the upgrade process: determine upgrade capability.
Windows 98
Windows 98 Second Edition
Windows Millennium Edition
Windows NT 4.0 Workstation
Windows 2000 Professional
Windows XP Home Edition
There are no supported upgrade paths for the following list of operating systems. Installations performed from these operating systems will require a clean installation, as detailed previously in the “Performing a Clean Installation” section of this chapter.
Windows 3.x
Windows 95
Windows NT 3.51 Workstation
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