I find Windows update to be the most reliable update of any software. Since 2005 I can't even imagine how many updates I have run on thousands of computers that never once "broke" because of an update. MS worked out how to test updates years ago and now , unless you have malware, its probably not going to break anything.
Also keep in mind that if Chrome was released in 1998 with its current update model it would of failed with people screaming to governments that Google was spying on them.