By default Guest account is disabled on Windows 7 computer. It can be used by users to login into computer when you do not want them to access your files. Guest account allows a user to log on to a network, browse the Internet and shut down the computer. You can enable guest account or
Change Guest account name on Windows 7
Windows 7 has guest account feature to allow anonymous logins. By default guest account is disabled on Windows 7 system. Incase you enable Guest account, it is recommended to rename guest account for security reasons. With different name, guest account will be identified as different user