The Microsoft Office 2007 suite in general, and Microsoft Word in particular, is the subject of a long-standing love/hate relationship of mine.
Case in point: I had opened a few Word documents, to catch up on some technical design plans our IT staff had submitted to me. I had 3 files open, plus an extra window with an empty document. When I was done reading the documents, I clicked the Office logo, then "Exit Word".
Imagine my amusement when I got an error message that "Microsoft Word has quit unexpectedly". Then Word let me know it was trying to find a "solution" to my "problem". The "problem" was that I tried to exit Word. So it should be of little surprise that Word has quit. That's what I was trying to do.