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MIKE WEATHERLY said:
How do I uninstall XP Pro back to XP Home?
You can only do this by a clean installation of XP Home. There is
no downgrade supported.
Why do you want to do this? Are you aware that Home is a subset
of Professional, and there is nothing in Home that's not also in
Professional. Unless you want to make the copy of Professional
available for use on another computer, there is no possible
advantage to doing this.