That title is pretty misleading. The breakage is being reported as being in the default program file associations (Default Programs under Control Panel/Settings):
https://support.microsoft.com/en-us/help/4028161/windows-10-...
https://support.microsoft.com/en-us/help/4028161/windows-10-...
It's a complete clusterfuck and makes me wonder why I'm so lazy and incapable of moving to Linux.
On the other hand, this is a comical fail on microsoft's part:
> some Win32 programs can't be set as the default program for a given file type. So if you want certain files to always open in Notepad, for example, you're currently out of luck.