The Timing
You know what my computer NEVER does? Updates when I don't need it. It waits. It WAITS until I'm in the middle of something important. "Oh, you have a deadline? PERFECT TIME FOR AN UPDATE!"
The update will then take 47 hours and require six restarts. Each restart shows the same message: "Updating... 1%... 2%..." as if it's personally Enjoying this.
The Update Notes
"We've improved performance and fixed bugs." What bugs?! I didn't know there were bugs! Now you told me! Now I'm paranoid about bugs!