So frustrated after spending the entire morning on the phone and web trying to figure this out... Office 2008 came preinstalled on my refurb Mac (thus, I don't have the install disc with the product key) and has been working fine since I bought my computer two years ago. Last week, I got a software update notification for Microsoft Word, so installed the update, and now I can't open Office without my product key - which I don't have!! I've done all of the deleting the office.pid files (which everyone suggests) but I still can't open it without the product key. Neither Apple nor Microsoft support has been any help. I'm so frustrated! If I wouldn't have installed the update that was suggested, this wouldn't be a problem!! Any suggestions??!!