In Unified Service Desk, when you launch the application, or on some pages, you may run into the issue “Retrieving the COM class factory for component with CLSID {0002DF01-0000-0000-C000-000000000046
} failed due to the following error: 80040154 Class not registered (Exception from HRESULT 0x80040154 (REGDB_E_CLASSNOTREG))”:
Looking in the registry for this class id, we see:
The workaround to resolve this was running USD as an Administrator, which is not ideal in all situations. If anyone finds another solution please post in the comments.
There are a few things to check here with this error, including ensuring no other instances of IE process are running:
And ensuring the Favorites bar is disabled in IE (this is the cause of a similar documented issue):
Potentially changing to install the x86 or x64 client may resolve the issue as well.
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