Fast User Switching Compatibility (FastUserSwitchingCompatibility) Service Defaults in Windows XP

Provides management for applications that require assistance in a multiple user environment.

Default Settings

Startup type: Manual
Display name:Fast User Switching Compatibility
Service name:FastUserSwitchingCompatibility
Service type:share
Error control:normal
Path:%SystemRoot%\System32\svchost.exe -k netsvcs
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\FastUserSwitchingCompatibility

Default Behavior

Fast User Switching Compatibility is a Win32 service. In Windows XP it won't start until the current user starts it. When the Fast User Switching Compatibility service is started, it is running as LocalSystem in a shared process of svchost.exe. Other services and drivers are allowed to run in the same process. If the Fast User Switching Compatibility fails to start, the technical information about the error is added to the Event Log. Windows XP startup should proceed, but a message box should be displayed informing the user that the FastUserSwitchingCompatibility service has failed to start.


Fast User Switching Compatibility depends on the Terminal Services.

Restore Default Startup Configuration of Fast User Switching Compatibility

Before you begin doing this, make sure that all the services on which Fast User Switching Compatibility depends are configured by default and function properly. See the list of dependencies above.

1. Run the Command Prompt.

2. Copy the command below, paste it into the command window and press ENTER:

sc config FastUserSwitchingCompatibility start= demand

3. Close the command window and restart the computer.

The FastUserSwitchingCompatibility service is using the shsvcs.dll file that is located in the C:\Windows\System32 directory. If the file is removed or corrupted, read this article to restore its original version from Windows XP installation media.