Session Structure – Memory management control structures including session Working Set List. ![]() ![]() Session space is divided into four different areas: The exceptions to this are services that need to interact with the console user, so these load into Winsta0 instead.Īll pages mapped to a specific user use the same memory pages, but each user has their own session space mapped in virtual memory. For example, services load under the ‘Service-0x0-3e7$’ non-interactive windows station. Other windows stations exist that do not interact with the user. The UAC window is part of the Secure Desktop (new for Vista and similar to the logon desktop) and will not allow you to interact with the Default desktop until you provide input. When you get a UAC prompt for instance, it takes a screenshot of your Default desktop and then displays it dimmed out behind the UAC window in the foreground. In Windows Vista this is even a bit more extreme. When you lock the workstation, the display switches from Default to Winlogon and there is no user interaction between the two. All three of these have separate logical displays, which is why your main desktop disappears if you lock the workstation. Under Winsta0 there are three desktops loaded: Winlogon (the logon screen), Default (the user desktop) and Disconnect. Only one windows station is permitted to interact with the user at the console this is called Winsta0. So, a session may contain more than one Windows Station and each windows station can have multiple desktops. A windows station is basically a security boundary to contain desktops and processes. This area is where session-private GUI objects are allocated from. A desktop is a session-specific paged pool area and loads in the kernel memory space. These objects include all windows, desktops and windows stations. Ī session consists of all of the processes and other system objects that represent a single user’s logon session. ![]() Today we are going to briefly go over the basics of some concepts that can be pretty confusing even at the best of times - Sessions, Desktops and Windows Stations. First published on TECHNET on Jul 24, 2007
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