Exception from HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG)
For those impacted by this problem, it helped to remove and reinstall the VMware Infrastructure Client in my case.
I think I caused this problem because I first installed VI Client 2.5 before removing VI Client 2.0. It worked without a problem directly after the VI Client 2.5 installation, so I noticed only the next day that it suddenly stopped working with the error:
Class not registered (Exception from HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG))
The first reaction is that there is something wrong with the VCC, or with Windows. But I think the uninstall of the VI Client 2.0 simply removed stuff from the registry that was crucial for VI Client 2.5.
Genuine installer bug.