Power Service Defaults in Windows 7

Manages power policy and power policy notification delivery.

Default Settings

Startup type:Automatic
Display name:Power
Service name:Power
Service type:share
Error control:normal
Group:Plugplay
Object:LocalSystem
Path:%SystemRoot%\system32\svchost.exe -k DcomLaunch
File:%SystemRoot%\system32\umpo.dll
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Power
Privileges:
  • SeTcbPrivilege
  • SeSecurityPrivilege
  • SeAssignPrimaryTokenPrivilege
  • SeTakeOwnershipPrivilege
  • SeLoadDriverPrivilege
  • SeBackupPrivilege
  • SeRestorePrivilege
  • SeImpersonatePrivilege
  • SeAuditPrivilege
  • SeChangeNotifyPrivilege
  • SeUndockPrivilege
  • SeDebugPrivilege

Default Behavior

Power is a Win32 service. In Windows 7 it is starting automatically on the operating system startup. Then the Power service is running as LocalSystem in a shared process of svchost.exe. Other system components, such as drivers and services, may run in the same process. If Power fails to start, Windows 7 attempts to write the failure details into Event Log. Then Windows 7 startup should proceed and the user should be notified that the Power service is not running because of the error.

Restore Default Startup Configuration for Power

1. Select your Windows 7 edition and service pack, and then click Download.

2. Save the Win7_Power_Service_Startup.cmd file to a local storage device.

3. Run the saved file as an administrator.

4. Restart the computer.

The Power service is using the umpo.dll file that is located in the %WinDir%\system32 folder. If the file is changed, damaged or deleted, you can restore its original version from Windows 7 installation media.