I bought my computer about 2 years ago, and it came with a 90-day trial for MS Office 2003. It just so happens that I'm just now needing to use it. When I click on one of the icons (Word, Excel, etc. ) it asks me for a product key. I never got one. I kept every piece of paper that was included with my computer, including the pieces of the box I cut off for rebate purposes. Is there a way that I can get my product key? Shoud I even need one for a trial version? What do I do?