Recently I had to do a full recovery on my computer. I need to re-install Microsoft Office. The problem is that when I originally bought my computer about a year ago, there was a 60-day trial of Microsoft Office. In order to maintain MS Office, I bought an upgrade disc and installed it. But now that I had to do a full recovery, my upgrade software won't work because I can't re-active the 60 day trial offer because I no longer have the original product key. Do you know how I can re-install MS Office without having to buy more software? Thank you.