Hello - I have implemented the permissions I've seen advised on here and the MS answers forum, but the error is still
occurring. Perhaps a fresh pair of eyes will spot something. Here's the error from the event viewer,
and an image from dcomcnfg showing the permissions set. The error mentions Cortana, which I have disabled.
Not sure if that's relevant or not
Thanks for any input.

The application-specific permission settings do not grant Local Activation permission for the COM Server application with CLSID
to the user DESKTOP-UOBEXYZ\davex SID (S-1-5-21-975320647-1881121576-200073987-1001) from address LocalHost (Using LRPC) running in the application container Microsoft.Windows.Cortana_1.6.1.52_neutral_neutral_cw5n1h2txyewy SID (S-1-15-2-1861897761-1695161497-2927542615-642690995-327840285-2659745135-2630312742). This security permission can be modified using the Component Services administrative tool.

Click image for larger version. 

Name:	ishell.jpg 
Views:	11 
Size:	55.4 KB 
ID:	47509