Windows 10 login screen

Good evening to all.
Been using windows ten now for a while,And quite happy with it.
Now the only slight issue that I have is when the laptop needs to restart when it comes to the Welcome screen my name is there and underneath the name it states The user name or password is incorrect.Try Again.

Now on the bottom left of the welcome screen there are two boxes with one with my name david@*****@outlook.com
and under that its just my name david Williams.
Now to pass the welcome screen I have to select the david*****@outlook.com then enter my password,That part is no problem.
But why is my name showing as well as the outlook one.How can I delete the david Williams one and just have the david****@outlook.com showing.
Any help here Please.
Thanks.

Thanks Brink for your prompt reply.
Looking at your link and on the welcome screen I notice your name on the bottom left that where mine is .
See image.
As you can see that's what I got.??

But will have a good look at the link you gave regarding the password setup in the morning,Getting a bit late here.

Many thanks.I will let you know how things develop.
David.

Brink.

Many thanks once again,I followed your instructions and we will see how it settles down.

Merry Xmas to you.

David