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How to Start/Stop
COM+ System Application service
Description Services Regedit Back CMD Msconfig
Service name: COMSysApp
Display name: COM+ System Application

Description:
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.

Path to executable:
C:\WINDOWS\system32\dllhost.exe /Processid:{02D4B3F1-FD88-11D1-960D-00805FC79235}  
Type services.msc and press Enter
Services.msc:
This method shows you how to Start/Stop COM+ System Application service from Services.msc
Please perform the following steps:

Please go to Start and choose Run ...
Locate COM+ System Application service observe his current status and open to make changes.
From General tab you can Start/Stop and change the Startup type of COM+ System Application service

To finish press ok button and close Services window
Type regedit and press Enter
Regedit:          
This method shows you how to change Startup type of COM+ System Application service from Registry
Editor.
Please perform the following steps:

Please go to Start and choose Run ...
Double click on Start and edit the value:

Change Startup type :

Automatic - 2
Manual - 3
Disabled - 4
Automatic (Delayed Start) - 2

Note: When you change to Automatic (Delayed Start) a new key DelayedAutostart is created with value 1.
When you change to Automatic from Automatic (Delayed Start), DelayedAutostart change value to 0.
Please select, right and copy a registry key from below, then right click on command prompt window
, select Paste and press Enter

To Start COM+ System Application service:

net start COMSysApp

Note: You can’t start a service if Startup type is on Disabled.

To Stop COM+ System Application service:

net stop COMSysApp

To change Startup type:

Automatic:
REG add "HKLM\SYSTEM\CurrentControlSet\services\COMSysApp" /v Start /t REG_DWORD /d 2 /f

Manual:
REG add "HKLM\SYSTEM\CurrentControlSet\services\COMSysApp" /v Start /t REG_DWORD /d 3 /f

Disabled:
REG add "HKLM\SYSTEM\CurrentControlSet\services\COMSysApp" /v Start /t REG_DWORD /d 4 /f

Automatic (Delayed Start):
REG add "HKLM\SYSTEM\CurrentControlSet\services\COMSysApp" /v Start /t REG_DWORD /d 2 /f

Note: When you change to Automatic (Delayed Start) a new key DelayedAutostart is created with value 1.
REG add "HKLM\SYSTEM\CurrentControlSet\services\COMSysApp" /v DelayedAutostart /t REG_DWORD /d 1 /f

When you change to Automatic from Automatic (Delayed Start), DelayedAutostart change value to 0.
REG add "HKLM\SYSTEM\CurrentControlSet\services\COMSysApp" /v DelayedAutostart /t REG_DWORD /d 0 /f
CMD:          
This method shows you how to Start/Stop and change Startup type of COM+ System Application service
from Command Prompt.
Please perform the following steps:

Please go to Start and choose Run ...
Msconfig:          
This method shows you how to prevent COM+ System Application service from starting with the
operating system using System Configuration (msconfig.exe)
Please perform the following steps:

Please go to Start and choose Run ...
Write msconfig and press Enter
In System Configuration please go to Services tab and locate COM+ System Application service. Uncheck
the
box to prevent this service to start and then press OK to finish.  
Any change make in System Configuration will be apply after restart.  
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Microsoft official disclaimer

Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by
using another method. These problems might require that you reinstall the operating system. Microsoft
cannot guarantee that these problems can be solved. Modify the registry at your own risk.

Please navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\COMSysApp and
locate
Start registry key
Type cmd and press ok