Re: multi pc installations

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There is but it is aimed at large organisations.
Have a look at:-
http://www.microsoft.com/windowsxp/home/howtobuy/addlic.mspx
or
http://www.microsoft.com/windowsxp/pro/howtobuy/addlic.mspx
you should be able to find out if you can purchase and additional key
at a lower price from here.

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