Exclude "computer-the COM server application has not been set by default"

In the event viewer, you can see:

Application-the COM server application (CLSID is
{0c0a3166-30c9-11d0-8f20-00805f2cd064}
The Local activation permission for grant the user nt authority \ network service sid (S-1-5-20 ). You can use the component service management tool to modify this security permission.

For more information, see Help and Support Center in http://go.microsoft.com/fwlink/events.asp.

Method 1:

Finally, I checked a lot of English documents and used the following methods:
Click "start"-"Control Panel"-"Administrative Tools"-"component service"-"computer"-"My Computer"-"DCOM,
Select "iis admin service" under it, right-click "properties", find "security", and edit "Custom" in "Start and activate Permissions ", add the Account "IWAM _*****",
Grant the "local startup" and "Local activation" permissions to this account, restart IIS (click "start"-"run"-"CMD", click OK, then run IISRESET ).

Method 2:

According to the prompt, the network service does not Permission Activates Applications . You can use components Service Management Tool to modify this security permission.
1. If you follow the prompts above to use Components The application with CLSID {BA126AD1-2166-11D1-B1D0-00805FC1270E} found by the service management tool is not found.
2) Run regedit.exe first and find the AppID value {27AF75ED-20D9-11D1-B1CE-00805FC1270E} corresponding to {BA126AD1-2166-11D1-B1D0-00805FC1270E} in the registry}
3. Open the component service, View Details, find netman In the DCOM configuration, and select and right-click to create a property.
4. In the netman attribute, choose security> "Start and activate Permissions"> Custom edit. Add the network service user to the start permission to allow local start and Local activation, after confirmation, the DCOM error will not be reported again.