Fast User Switch is a tool on the task bar. With one click, you will be taken to the user selection screen. With Fast User Switch, users can switch sessions without closing Windows or programs. For example, User A is logged on and is browsing the Internet, User B wants to log on to their user account and check their e-mail account. User A can leave their programs running while User B logs on and checks their e-mail account. User A can then return to their session where their programs would still be running.