Hi! I'm Eric, a Mac expert who's been paired with you through JustAnswer.com. I'm reviewing your question now, and will return w/ an answer soon!
I'm very sorry to hear that you're running into this problem. I will do everything I can to assist!The Classic Environment is Apple's software that supports running Mac OS 9 apps on Mac OS X. ("Mac OS Classic" refers to Mac OS versions before Mac OS X.) Both Mac OS 9 and Classic are really old: Mac OS 9 was discontinued in 2001, and the last version of OS X to support Classic is 10.4 (Tiger), which was released in 2005.The fact that you're receiving this message is odd, seeing as how your Mac would have shipped with OS X Lion...so Classic would have never been supported in the first place! The best course of action will be for us to completely remove and then reinstall Office.Before we undertake that task, I need to ask: what version of Microsoft Office do you have, and do you still have your installation disc?