Windows 10 fast user switching registry

            Windows 10 fast user switching registry

The Linux kernel's VT subsystem (please consult the articles Pseudoterminal, Linux console and Virtual console) dates back to 1993 and does not understand the concept of multiple "seats", meaning that of the up to 63 VTs, only one VT can be active at any given time. Despite this kernel limitation, multiseat is supported on GNU/Linux. The feature of "fast user switching" has less severe necessities then multi-seat does because the multiple users don't work simultaneously, and therefore simply works.

The most straight forward solution to elegant multi-seat are kmscon/systemd-consoled in combination with systemd-logind. The available desktop environments such as GNOME or KDE Software Compilation adapt their graphical login and session manager (e.g. GDM, SDDM, LightDM, etc.) to the underneath solution and have to be configured to implement fast user switching that way.

For installations with older environments, the functionality must be enabled disble fastuser switching in the appropriate configuration files then a hot key sequence such as CTRL-ALT-F8 is pressed. A separate login window will now appear and the second user can log in (or even the first user again). Alternatively, in the default install, new X sessions can be started at will by using different display parameters to have them run in different virtual terminals (e.g. "startx -- :1" or "X :1 -query localhost"). Again, hot key sequences allow the user switching to take place.


Fast user switching may potentially introduce various security-related complications[citation needed], and is handled differently among operating systems, each having its advantages and disadvantages. One possibility, simple and secure, is that only the first user gets ownership of resources. A second option is to grant ownership of resources to each new user. The last one to log in takes ownership. A third is to allow all users access to shared resources. This is easier and more intuitive, but allows (for example) one user to record another user's conversation. In Windows, shared resources, such as sound, are available to all sessions. In Red Hat Linux, the default behavior is to give ownership of "console resources" to the first connected session, but it can share resources among groups of console users or be configured to manage console ownership differently.

In Windows Vista, GINA is replaced by Credential Providers, however they do not support programmatic initiation of fast user switching.

Fast User Switching allows users to sign into a computer while other users are still signed in. While it offers the obvious advantage of not forcing other users to sign out before you can sign in with your own account, it does have some disadvantages. As long as other users are signed in, Windows is using extra resources on them—especially if they have left resource-intensive apps or background services active. If other users are signed in, you also cannot restart or shut down the PC without having them sign out or risk losing any open files they haven’t saved. If you do have multiple users on your PC and you’d rather not have Fast User Switching available, you just have to make a quick edit to the Windows Registry or Local Group Policy Editor.

You should note that this hack does not technically disable Fast User Switching. Instead, it hides all the switch user interfaces that occur on the Start menu, sign in screen, and Task Manager. Once all users have signed out of their user accounts, they will no longer be able to switch to other users using the Windows interface, which for all practical purposes is the same as disabling the feature.

If you have a Windows Home edition, you will have to edit the Windows Registry to make these changes. You can also do it this way if you have Windows Pro or Enterprise, but feel more comfortable working in the Registry than Group Policy Editor. (If you have Pro or Enterprise, though, we recommend using the easier Group Policy Editor, as described in the next section.)




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