I am running MS Windows XP and own an upgrade. I have to
reformat my disk and wonder if I will be able to reinstall
the program on the same computer.
Yes. You will have to provide evidence of ownership of the qualifying
product - that *may* mean, if that was a 'restore' type CD that you will
have to reinstall the earlier system. But Run the CD from the existing
system. Enter Install, change Upgrade to New Install, then when it asks
you to confirm where, you can hit ESC and get the chance to select the
current partition, delete it, and create a new RAW one, going on to
format it as part of the setup
I think that this will also have detected that it was a legitimate
upgrade, and not even ask for the previous system's CD as evidence, but
am not certain on that
First read up at
www.aumha.org/a/wpa.htm and particularly the Hint in
formatting drive to conserve one 'life' in Product activation
