You might need to log into a Windows computer, but not with your current username.

  1. After the computer boots, you will press Control + Alt + Delete to log on.
  2. Press the Switch User button.
  3. Press the Other User button.
  4. At the next screen enter the other username and password. 

Note: If you are logging in for the first time with your new firstname.lastname format username, you will not notice any change in your files when you log in — your old profile will automatically merge with your new profile.