There may be trouble ahead
Like a lot of people, I trust Windows Update to do a reasonable job of patching insecure code and generally making life a bit safer. That includes optional updates, where you can make the natural assumption that if they're there, having them can't do much harm. It's a lot easier to hit Install than wade through and research a bunch of tick boxes.
That may now have all changed. No sign of a Windows 10 on my PC yet, but any sniff of it without my in-your-face consent might result in a restore from disk image.