Just boot the working installation, "nuke" the system folders pertaining to the first. If you are getting a multiple choice at system startup, you will need to edit boot.ini on the root of the boot partition to remove the reference to it.
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Best of Luck,
Rick Rogers aka "Nutcase" MS-MVP - Win9x
http://mvp.support.microsoft.com/
Associate Expert - WinXP - Expert Zone
www.microsoft.com/windowsxp/expertzone
Win98 Help - www.rickrogers.org
"Poster" <pos...@mutemail.com> wrote in message news:07o4dvgc9jgp77n2a...@4ax.com...
> It was necessary for me initiate a parallel "clean install"
> of Windows XP Pro in order to preserve data and no longer
> deal with an *existing* XP Pro that came with my CPU
>
> Bottom line: new XP Pro system works great; data recovered
> and backed up; all original files are intact and "in the middle."
>
> HOW DO I COMPLETELY UNINSTALL THE FIRST ORIGINAL
> XP SYSTEM without affecting the new one. Would there be any
> system files in common? If not, I have the two systems in two
> separate directories; should I just nuke the first? Thanks
>
> Respond by e-mail, please, if possible!
"Rick "Nutcase" Rogers" <ri...@mvps.org> wrote in message
news:uzeva3%23IDH...@TK2MSFTNGP10.phx.gbl...