In an elevated command prompt, run the commands below (pick an option and substitute Username and passwords with your own).
Creating an administrator with a password
Creating a standard user without a password
:: Creates new user "Username" with the password "asdf1234"
net user Username asdf1234 /add
:: Makes this user an administrator
net localgroup Administrators Username /add
:: Remove new user from the Users group
net localgroup Users Username /delete
Bonus: passwords never expire
net user Username /add
If you have errors, post screenshots.
net accounts /maxpwage:unlimited