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

Before you begin doing this, make sure that all the services on which COM+ System Application depends are configured by default and function properly. See the list of dependencies above.

1. Run the Command Prompt as an administrator.

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

sc config COMSysApp start= demand

3. Close the command window and 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.