Greetings --
You haven't clearly identified to specific types of licenses and
installation CDs involved, so I'm winging it a bit here. If I read
your post correctly, you cannot re-use the WinXP Home.
First of all, if I correctly understand that WinXP Home came
pre-installed on the PC from the factory, you have an OEM license for
WinXP Home. An OEM version must be sold with a piece of hardware
(normally a motherboard or hard drive, if not an entire PC) and is
_permanently_ bound to the first PC on which it's installed. An OEM
license, once installed, is not legally transferable to another
computer under _any_ circumstances. You can remove or replace it, if
you like, but you cannot reuse it on a different computer.
Secondly, if you used an Upgrade version of WinXP Pro, the license
for WinXP Home has been subsumed (became an integral part of) by the
WinXP Pro Upgrade license. Basically, you have no license to use the
Upgrade without there first being an early qualifying license
permanently in place.
However, if I've misunderstood your post, and you replaced a
retail WinXP Home license using a Full version of WinXP Pro, then you
could legitimately reuse the WINXP Home license.
Bruce Chambers
--
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