er...

In most countries isn't it against the law to access someone's computer without their consent? If Microsoft altered files on my computer without my knowledge or consent, regardless of their reason, then that is the same as someone hacking into my computer and accessing/altering my files. I think the relevant statute in the state of Washington is this one.

RCW 9A.52.120

Computer trespass in the second degree.

(1) A person is guilty of computer trespass in the second degree if the person, without authorization, intentionally gains access to a computer system or electronic data base of another under circumstances not constituting the offense in the first degree.

(2) Computer trespass in the second degree is a gross misdemeanor.