Sign-in has changed

[jrj350]

My sign-in has changed. The password is the same but the email sign-in has changed to just my first name.
I have not done anything new but I did allow another to us my computer for a short while. Not blaming them but this mishap occurred after they used the computer.
I have checked many places and they all say the sign-in is my email, so I am lost.
Now I have to delete the sign-in name and type my email in. It is a bother.
Any ideas?

 

[Regedit32]

Hi,

Hopefully I understood your post correctly!

Try clicking Start > settings cog then in the Windows Settings app that opens click Accounts

Note: You can also get to this screen by left-clicking on Start > Account icon > Change account settings

Now click in the main window: Sign-in with a local account instead