I purchased a copy of Microsoft Office Student Edition last year. My computer's hard drive crashed which meant that I had to reinstall the software and use the serial code again. It is now telling me though that the number of uses has been exceeded.

Is there a way to tell Microsoft that I'm trying to validate on the same machine that I was already operating on? I really don't want to have to purchase it again to run on the same machine that it was already running on.