For example, service processes that run as Locally unique identifier (LUID) of the logon session incorporated into Station for every LSA logon session associated with a service, with the In session 0, in addition to WinSta0, Windows creates a separate window In TS sessions 1Īnd higher, Windows creates only a WinSta0 window station. Within a TS session, only the window station named WinSta0Ĭan display a user interface or receive user input. Ī window station is a securable object that contains a clipboard, anĪtom table, and one or more desktops. It might or might not happen toīe session 0 on Windows XP/Windows 2003, but it is never session 0 onĮach terminal services session contains one or more named window stations. On a computer are remote desktop sessions, the console session remainsĬonnected and displays a logon screen. The locally attached keyboard, video, and mouse. The console session is the terminal services session associated with The term console session is sometimes mistaken as a synonym for session 0. Separation between end-user processes and system processes is called session 0 isolation. Interactive user sessions run in sessions 1 and higher. Newer, services run in session 0, but for security reasons all Off before a second one logs on, the second user uses session 0 as well.Ĭonsequently, on a domain-joined Windows XP, session 0 is always the Windows XP and Windows Server 2003Ĭreate sessions 1 and higher only when needed if the first user logs XP and Windows Server 2003, the first interactive user to log on to aĬomputer also uses terminal services session 0 and, consequently, uses Windows services always run in terminal services session 0. Namespace serves as the local namespace for processes in session 0. Numbered 1 and higher to provide isolation between sessions. Object Manager and a session-private “local” namespace for each session Windows defines a global namespace in the Services sessions are identified by an incrementing numeric session ID, Session, but you cannot log on with a different user account unless the ForĮxample, if a user is logged on at the console, you can log on to theĬomputer via Remote Desktop using the same account and continue that Windows XP computer supports at most only one interactive session. Update a display device and receive keyboard and mouse input. Multiple disconnected sessions simultaneously, only one session can That is, while processes can continue to run in Windows Vista, and Windows 7) is that only one interactive session canīe active at a time. An important limitation of Windows clients (Windows XP, RemoteApps), and virtual machine integrationįeatures. Remote Desktop, Remote Assistance, Remote Applications Integrated Features they support include Fast User Switching, Were not incorporated into the Windows client operating system family Introduced in Windows NT 4.0 Terminal Server Edition, they Services support multiple interactive user sessions on a singleĬomputer. Relationship between sessions, window stations, and desktops. Sessions and TS sessions, they are completely separate entities. Although Windowsĭocumentation doesn’t always make a clear distinction between LSA logon These and logon sessions created by the LSA. There is also a loose relationship between Each of these securable objects has resourcesĪllocated for its sole use. Each session contains one or more window stations, whichĬontain desktops. At the outermost layer are terminal services Let’s start with an overview of the hierarchy, an example of which is depicted in Figure 1 ,Īnd then define the terms. Understood, can be critical to problem solving on the Windows platform. Running on the “same desktop.” These concepts, although not widely Interactive and noninteractive window stations and other programs Sessions, session IDs, the “console session,” and “session 0” Utilities-including Process Explorer, Process Monitor, PsExec,ĪdInsight, Desktops, and LogonSessions-refer to terminal services The descriptions of several of the Sysinternals
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