The error " Failed to start Word" occurs when trying to start Microsoft Word. Possibly your Microsoft Windows account is not authorized to run COM components on this machine. Refer to documentation for more information. This error occurs when you try to Edit or View a document in the ITP/MDK Repository while you are using a Microsoft Windows User Profile that is not authorized to initiate COM objects. This is, for instance, the case when you are using a guest profile on a workstation.
What happened is that the ITP/MDK Repository tried to start the ITP/Model Development Kit (Microsoft Word) using a COM componen. However, because the user profile you used is not known on the local machine or does not have enough rights, you were not authorized to instantiate a COM object.
The solution is either to log on to the local machine under a known user profile or to create your own user profile on the local machine.