Two copies of XP one used the other no longer 1

[mcputer]

I have two copies of Windows XP; they were both installed on diferent machines at one time. One of the machines is now in the bit bucket. My problem; how do I tell which copy was on which machine so that when I install one on a new machine, I don't use the code for the machine that is still being used?

Thanks

Rob

 

[wolluf]

There are a number of ways of reading the XP key - eg,

http://www.aida32.hu/aida32.php

(software/licences bit).

 

[mcputer]

Thank you, that did the trick.

Rob