The Mandatory Profiles feature in Windows allows to create read-only user profiles. A mandatory profile is a special pre-configured type of roaming profile that doesn’t save changes made by the user during the session.
Any changes made to the profile during the session, as well as the various files stored, are lost when a user logs out. At the next logon, the mandatory profile is loaded unchanged. Such a profile can only be changed by an administrator. Mandatory profiles can be used on public computers, information kiosks, schools, and other educational institutions where user changes must be discarded when the session ends.