Guest
A user account for people who do not have individual accounts. Every computer has a local Guest account, and every domain has a domain Guest account.
By default, Guest is a member of the Everyone and the Guests groups. The domain Guest account is also a member of the Domain Guests and Domain Users groups.
Unlike Anonymous Logon, Guest is a real account, and it can be used to log on interactively. The Guest account does not require a password, but it can have one.