This was quite an annoying experience. When I upgraded to Windows 10, I expected the same user privileges would be the same when my operating system was still Windows 7. But alas, in Windows 10, every time I run some programs, it tells me access denied.
Hell. My account is not connected to any domain network since it is just a personal PC. It is quite annoying to have to manually set the account to be part of the Administrator group.
Sure. Good for me because I know how but for those who are not technically inclined, it can be a waste of time having to find a solution how to bypass it.
So anyway, since you are here, follow these steps:
This was a painstaking experience because it took me countless forum posts that mostly never worked for my scenario until I came across one that did the trick. And the post topic was not even about having problems signing in to a Microsoft account from a local account in Windows 10.
What did solve for me was by executing a command in Powershell for a broken Start Menu (since this is also where Cortana can be found at first run).
Open Windows PowerShell as Administrator
Right click Start button
Choose Command prompt (Admin)
Key in Powershell in the black window and hit Enter
Paste the following command in the Administrator: Windows PowerShell window and press Enter key: