Try this out...
I think the wrong email address that you have mentioned while “Login In” is an existing valid email ID which somebody might be using, otherwise Microsoft wouldn’t have allowed you to get so far. Alternatively, you can try the below given method:
- Login to your Microsoft account on microsoft.com with your (wrong) email and go for password change option.
- Now, you can select a mobile phone number or alternate email address to get the verification for password change.
See if you can login and change the password. New password is what you needed at the end. After this I would suggest you to setting up the PC with a local account. Create new Microsoft account with the correct email address and add it to the PC and remove the account with wrong email address.