Hi again,
Just read your latest inbox to me.
Quick question: Are any universal apps that came with your Windows 10 install also not working for you?
For example, Edge, Mail, Photos, etcetera.
Given your issue persists despite doing the above and that you say you are the administrator and only user of computer with a MS account, there may be a corruption going on either with your user profile, or with Windows 10 itself.
Also, have you at any time used a DISM command to reigster or de-register any universal app using either Command Prompt or Powershell. There are a number of suggestions out there on the search engines to do just this, however some of the suggestions are deprecated now and actually cause more troubles than solutions.
One last question: What build of Windows 10 are you currently using?
- Start > Settings > System > About
Sample image
Regards,
Regedit32