COM+ System Application (COMSysApp) Service Defaults in Windows 8

Manages the configuration and tracking of Component Object Model (COM)+-based components. If the service is stopped, most COM+-based components will not function properly. If this service is disabled, any services that explicitly depend on it will fail to start.

Default Settings

Startup type:Manual
Display name:COM+ System Application
Service name:COMSysApp
Service type:own
Error control:normal
Object:LocalSystem
Path:%SystemRoot%\system32\dllhost.exe /Processid:{02D4B3F1-FD88-11D1-960D-00805FC79235}
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\COMSysApp
Privileges:
  • SeAssignPrimaryTokenPrivilege
  • SeAuditPrivilege
  • SeChangeNotifyPrivilege
  • SeCreateGlobalPrivilege
  • SeDebugPrivilege
  • SeImpersonatePrivilege
  • SeIncreaseQuotaPrivilege

Default Behavior

The COM+ System Application service is a Win32 program that can be started by the Service Controller and that obeys the service control protocol. In Windows 8 it will not be started until the user starts it. When the COM+ System Application service is started, it runs as LocalSystem in its own process of dllhost.exe. If COM+ System Application fails to start, the error details are added to Windows 8 error log. When the operating system startup is complete, the user is being notified that the COMSysApp service hasn't been started.

Dependencies

COM+ System Application can't start, if any service from the list below is disabled or not available:

Restore Default Startup Configuration for COM+ System Application

1. Select your Windows 8 edition and update pack, and then click Download.

2. Save the Win8_COMSysApp_Service_Startup.cmd file to a local storage device.

3. Run the saved file as an administrator.

4. Restart the computer.

The COMSysApp service is using the dllhost.exe file that is located in the %WinDir%\system32 folder. If the file is corrupted or deleted, you can put it back in there.