What I really don't understand is why Windows Update takes so long to apply each update. I wouldn't mind 200 updates and a couple of reboots if it only took 10

What I really don't understand is why Windows Update takes so long to apply each update. I wouldn't mind 200 updates and a couple of reboots if it only took 10 minutes to go through them. In most Linux distributions, an update simply unzips a tarball somewhere and runs some bash scripts. Unless it's a very large package, each update usually only takes a fraction of a second on SSD, and maybe few seconds on HDD. Windows, on the other hand, often takes minutes installing each update. Going from freshly-installed to fully-updated can easily take several hours, even on an i7 with SSD and a very fast connection (so the download speed is not a factor). It's even worse on an older computer; I've seen a smallish .NET update taking over 10 minutes to finish, and there were several such updates. What the hell is it doing behind the scenes that takes so much time?