what is windows shell experience and why do i get a window telling me to ask for permission to use it

I stumbled upon a possible solution (maybe just a workaround?) on another thread covering the same issue. Here's what I did to resolve the warning (proceed at your own risk):

1. Right click on the Start button and click Run
2. In the Run dialog box type in: netplwiz and click OK or press Enter
3. In the User Accounts wizard look for duplicates of your user account and remove any user account that isn't part of the Administrators group and click OK when done.
4. Sign out of Windows and sign back in again.

A word of caution, consider backing up your user profile. While removing duplicate accounts in this fashion shouldn't affect your user profile in any way, anything is possible. You might also consider creating a local-only administrator account as a backup in case you are the only admin on the account. 

At any rate, this worked for me and I it leave here with the hope that might bring relief to some of you as well. :)

I had the same issue, started a few days ago. I contacted MS support via chat (well, that's why they are for, right?) and finally I got into a technician who solved it via remote assistance.

The solution was to switch back to local account from MS account (Settings>Accounts>Sign in with a local account instead). Then logoff-logon again, and then connected back to MS account. (Same steps but "sign in with MS account" this time.)

He said it was something with MS account not synced properly to local computer.

Hope this helps.

followed the exact same steps, as soon as i logged in again with my MS account, the error showed up again.

This is not an issue limited to a few people but widespread and started after the last big upgrade.

I have this problem on one of my older laptops too. For the most part I like my Office 365 sub it enables my wife and my three kids and I to each have a separate account that works quite well as we all have separate devices. My "solution" is to load Win 10 LTSB (if you are fortunate enough to be part of a Enterprise licence) it is simply the best version of Windows I've ever used. You get lean and fast Windows with all the essential security but none of the non-essential crap/bloatware and problem causing  "updates" it's as stable as a rock.

Apparently, there is something corrupted in the family group settings stored away on the Microsoft servers. Having cleared the family settings locally does NOT alleviate the problem, as it 're-downloads itself' again immediately upon a log-in into any Microsoft account stored on the system. 

I have a hunch that this may be solved ONLY by completely deleting and recreating one's family group and its settings at account.microsoft.com

Has anyone tried this approach?