Yes you do have to reinstall everything, but reinstalling everything can be a lot quicker than trying to work out exactly what has gone wrong and what needs doing to fix it.The problem with a clean install is that you have to reinstall everything else as well - isn't it? Takes hours and hours.
Or am I wrong?
Microsoft deliver new versions as though they were just normal updates - which of course they're not. Microsoft's aim is Windows 10 as a service, which I take to mean that it just works. Sadly, and not unusually, Microsoft's goals are way ahead of their ability to deliver them. Upgrading to a new version should be seamless but for all sorts of reasons (that I won't go into unless you really want to be bored) it's far from seamless for an unacceptable number of users.That's the screen shot of what leads me down the rabbit hole - it reappeared again today
It's not me trying to update or upgrade anything, it seems to be a regular windows update
Its doesn't appear to be causing any issues tho apart from the annoying notification, so I might just leave it well alone