I've always said that the most useful thing I was taught in college came from my freshman English Prof, who advised "Write not so that you can be understood; write so that you cannot possibly be MISunderstood." To me, that's wisdom for the ages and something I wish heartily that I could drum into the skulls of technical writers. They, and especially they, violate this essential tenet of writing, especially important in technical writing, over and over and over again. In this case, even Microsoft, with half of all the money in the world, could not provide a writer, proofreader, or editor who knew his tush from his elbow about conveying important information in understandable prose.
Maddening, and the very worst are tech-support people trying (and failing) to help via carelessly worded emails. When I do get a clearly written reply from one of them, I go out of my way to praise and thank them for answering my simple question unambiguously.