Dolly, this thread began on July of last year.
Haven't YOU seen this problem? Or are you still running Windows 8 so you don't have to deal with this Microsoft arrogance?
Really, Dolly, tell ALL of us what version of Windows you're running, AND tell us what your default apps are for all of the purposes mentioned in this thread.
This is not a BUG. It's a deliberate attempt to FORCE us to use Microsoft's programs, when they are obviously not as good as all of the third party apps that every one of us in this thread have chosen to use.
Let me make my own decisions about my favorite programs, and leave my settings alone.