CoCreateInstance returns 0x8007007e (Module could not be found) for the first call only at system startup on Windows 2008 Enterprise SP2

Question

Hi Guys,
I'm experiencing a problem with CoCreateInstance, where it returns error 0x8007007e.
The code is something like this:
HRESULT hRes = S_OK;
CComPtr<IMyInterface> spObj;
if(FAILED(CoInitialize(NULL))) { /* quit */ }while(FAILED(hRes = spObj.CoCreateInstance(CLDIS_MyClass, NULL, CLSCTX_LOCAL_SERVER)))
// LogFailure(hRes);
Sleep(10);
The problems occurs only on a single machine having Windows 2008 Enterprise SP2 installed (it works fine on other machines / OS versions). It happens only during the system startup (this is a Windows Service) and only for the first call of the CoCreateInstance.
The second call always succeeds.
The problem does not occurr when starting the service manually from Services.
I did some investigation using Process Monitor and found that the HKCR\CLSID\[CLSID of MyClass]\LocalServer32!LocalServer32 registry value is accessed before the failure. The registry value exists - it is added by the Windows Installer during
installation.
If I remove the registry value then the CoCreateInstance always succeeds.
I've been trying to lookup for some documentation on HKCR\CLSID\...\LocalServer32!LocalServer32 but haven't found anything useful other than it's a "Windows Installer Entrypoint". I assume that the Windows Installer does some integrity checks when
calling CoCreateInstance for such class and this fails for some reason but currently I fail to find the reason.
Can anyone help finding out what's the root cause of the 0x8007007e error here, please? Any help or tip is much appreciated.
Many thanks!
Marcin.

Answer 1

Hi Marcin,
This forum is mainly for talk about the product use related issue and not the best place to talk about the develop issue, for the develop issue we can post in MSDN forum for
the further help and your issue may need capture a dump then for the further analysis it is not an efficient way to work in this community since we may need more resources which is not appropriate to handle in the community. I‘d like to suggest that you submit
a service request to MS Professional tech support service so that a dedicated Support Professional can further assist with this request.
MSDN forum
https://social.msdn.microsoft.com/Forums/en-US/home
Please visit the below link to see the various paid support options that are available to better meet your needs.
http://support.microsoft.com/default.aspx?id=fh;en-us;offerprophone
Thanks for your understanding and support.
Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you have feedback for TechNet Support, contact [email protected]