If no powershell fixes etc help, that leaves an in-place upgrade repair install, if you've not done one. That leaves all programs and user data in place, and most settings.
I assume you've seen
https://www.tenforums.com/tutorials/...dows-10-a.html
https://www.tenforums.com/tutorials/...dows-10-a.html
https://www.tenforums.com/tutorials/...dows-10-a.html
Its a daft problem a few are having problems with you need the new store app which solves it problem being you need to get onto the store to get it. If you can goto the store and check for updates stop any other than the store one from downloading and see if you can get the store down as its an upgrade not a install
I recommend that you repair Windows 10 with an Inplace-Upgrade as this is the easiet way ro resolve the issue with not being able to install apps from Windows store.
Instructions can be found here:
Repair Install Windows 10 with an In-place Upgrade
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