Windows 7 Services

Desktop Window Manager Session Manager - Windows 7 Service

Provides Desktop Window Manager startup and maintenance services.

This service also exists in Windows Vista.

Startup Type

Windows 7 edition without SP SP1
Starter Automatic Automatic
Home Basic Automatic Automatic
Home Premium Automatic Automatic
Professional Automatic Automatic
Ultimate Automatic Automatic
Enterprise Automatic Automatic

Default Properties

Display name:Desktop Window Manager Session Manager
Service name:UxSms
Path:%WinDir%\System32\svchost.exe -k LocalSystemNetworkRestricted
Error control:normal
  • SeAssignPrimaryTokenPrivilege
  • SeCreateGlobalPrivilege
  • SeIncreaseQuotaPrivilege
  • SeSecurityPrivilege
  • SeTcbPrivilege

Default Behavior

The Desktop Window Manager Session Manager service runs as localSystem in a shared process. It shares an executable file with other services. If the Desktop Window Manager Session Manager fails to load or initialize, the error is recorded into the Event Log. Windows 7 startup should proceed, but a message box is displayed informing you that the UxSms service has failed to start.

Restore Default Startup Type for Desktop Window Manager Session Manager

Automated Restore

1. Select your Windows 7 edition and Service Pack, and then click on the Download button below.

2. Save the RestoreDesktopWindowManagerSessionManagerWindows7.bat file to any folder on your hard drive.

3. Right-click the downloaded batch file and select Run as administrator.

4. Restart the computer to save changes.

Note. Make sure that the uxsms.dll file exists in the %WinDir%\System32 folder. If this file is missing you can try to restore it from your Windows 7 installation media.

Yea, though I walk through the valley of the shadow of death, I will fear no evil: for thou art with me; thy rod and thy staff they comfort me.