Would you care to download 10586 ISO and do a Repair Install ?

Tech Bench link for Windows 10, 10586 iso file ...

Suggestion only :

System file check to look for corrupt files. It will try to do repair if any found...................
Right click at Start button > click Command Prompt (Admin) > at the...

This may not solve all your problems.
In Windows Vista and Windows 7, we have this method to set default programs.........
You can still use it in Windows 10.

Right click at Start button > click...

Meanwhile, if this problem is NOT too long ago, and if you do remember a date you did not have this problem, please do a system restore.
Pick a date when you did NOT have this problem as your...

Which app do you want to change or set as default ?