Hi,
Remove or uninstall WinXP from computer A
Install it on computer B
Activate it (by phone if necessary if the original installation is not that
old).
This will be allowed for any retail version of WindowsXP, all you need to do
if you phone in activation uis tell them it was removed from computer A.
Many OEM and preinstalled versions do not allow for a transfer to new
hardware, if this is the case, you will need a new WindowsXP license for the
installation to computer B.
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Best of Luck,
Rick Rogers aka "Nutcase" MS-MVP - Win9x
Windows isn't rocket science! That's my other hobby!
Associate Expert - WinXP - Expert Zone