I agree with all you said. I want to add that I (and I guess everybody else here) actually paid money for this OS, which now, intentionally or by incompetence, is unusable. This exact same problem is reported by hundreds, probably thousands of people, since what? Six months? Microsoft does not seem to care at all, there is still no fix, not even an attempt to fix it. I'm not a beta tester for Microsoft and have better things to do in my life than trying to flip bits in the registry, delete, modify or touch some random files, hoping to magically fix a broken update. It might be a coincidence, but this one computer has a reduced internet speed as well, while all other systems do not. What is this? A try to "motivate" me to "update and restart"?!?!?! Do watch the update install and then undo everything for about half an hour?
That being said: is there a lawyer here that is interested in starting a class action lawsuit against Microsoft? I'm fed up and I'm happy to join.