Windows 10: Upgraded to Win10, wrong email listed at sign in

My elderly grandpa who lives out of state upgraded to Windows 10. I don't know what he did, but at the sign in screen, it has a yahoo account that does not exist. I tried resetting the info for that yahoo account but it says the account doesn't exist. He does know his correct yahoo account which is apparently linked to his MS account. I can't seem to find out how to remove the non-existent login account in order to get him signed in with his actual account. Everything I'm seeing involves ISO's, CD's, or bootable recovery drives none of which he would have. Is there a way to correct his sign in account considering we're unable to log into Windows to begin with because it's asking him to sign into an account he doesn't have?

:)

 

wrong email at sign in

Hello,

To resolve the issue with your user account information, we recommend deleting the account and recreate a new one.

You may check Likhitha V post
here.

Let us know how it goes.

Regards.

 

wrong email at sign in

on my 8 yr old son's laptop with windows 10, when he turns it on it shows a log in screen that requires a password, but the email listed as the username (which is pre-entered) has .coom as the extension instead of .com. We can get no further than this
screen, so how can I change this so either he doesn't need a password to log in or it shows the correct .com extension so we can use the associated password. This page has only popped up since we added my microsoft account to his computer to enable him
to access and play minesweeper on his computer.

 

Ok, so if it says the yahoo account doesn't exist; have you tried creating it instead of trying to obtain info on it instead?

Try creating that account. Then signing in. That would be the easiest thing to try first.
If yahoo won't let you create it, then I'd call them to see if you can sort that part out.

 

Is there not a way to disassociate the yahoo account with his Windows 10 sign in, and use the actual account he used to purchase Windows with?

 

I should be more clear. When he boots up, he can't sign into Windows as the account listed is to a yahoo email address that doesn't exist, and none of his common p passwords will let him sign into Windows. We're hoping for a way to sign into Windows without that account.

 

How to Change Microsoft Account Email Address


You can use that to try changing the MS account.

You have to be windows to change the ms account association AFAIK within that install ...

 

Can you create a yahoo email account for him, give him the yahoo email password and then it will work?

I just signed into my microsoft account using that link, and I see my associated PC listed.
What would happen if I "remove pc"?
How will that affect my login to win10?

Currently I login with my email and email password, which I dont know if I like that.
I actually would prefer no login, it just boots up with no password like it always used to do.

Other odd thing is, I changed the background image on one win 10 pc, then when I log into a different win10 pc, the background matched the first one.

 

Thanks dude, this actually got him in -- gonna use teamviewer to hop on in a bit and fix him up. Thanks again.