yes, my file and folder has everyone full control.

I checked the event viewer. It is showing the following error:

The application-specific permission settings do not grant Local Activation permission for the COM Server application with CLSID {Fab1234D-1588-4BA3-92D4-123431235f3r} and APPID {34B12342-123D-4824-B42E-1234AE61BB05} to the user MyDomain\MyAcct SID (S-1-5-21-1234565741-12412345839-921234558-432120) from address LocalHost (Using qwer). This security permission can be modified using the Component Services administrative tool.

How/What do I need to modify using Component Services administrative tool?

I opened Component Services administrative tool, but did not find an application with id {Fab1234D-1588-4BA3-92D4-123431235f3r} or {34B12342-123D-4824-B42E-1234AE61BB05} under DCOM Config.

Thanks.