Have you ever inadvertently mistyped your user name (also called your logon or account name) during the installation of Windows 8.1? For most people this is not a big deal, since you only see your display name at the login screen (which is not the same as the user name and can easily be changed). If you’re at another network location however, you have to type in the user name to log into the machine, and this can be a bother if you can’t remember it. This happend to me during a custom installation for a client; I needed to log into the PC to transfer files and decided to change the name. Not as easy as it should be.