*sigh* ok...I've looked everywhere online for information on what to do, and tried several things but it just isn't working so I thought I'd ask here.... I bought my mac used on ebay last year. Came preinstalled with Microsoft Office 2008. The Mac works great, I love it, and so has Office until just a couple days ago I tried to open WORD and it tells me that the product key is invalid and must be tried again or whatever. It takes me to a link where it shows me how to delete certain files from Office so that I can reinstall and type the key in again, but I try that and nothing works plus I do not have the key because Office was already installed when I got the computer! What can I do and why is office 'suddenly' realizing the key is invalid? Help would be SO APPRECIATED!!