Answer by Andreas Maier for Virtualbox: run vboxmanage on windows host via SSH?

I had the same problem as described by André, using SSH (from a virtual CentOS 7 on the same host) into the Windows 7 Pro via BitVise SSH Server.

I can confirm that the solution described by Hari, of setting the identity in the Component Services->Computers->My Computer->DCOM Config->VirtualBox Application properties to "interactive user" (it was originally on "launching user") solved the problem (after a reboot to activate the change). I did not need to install VBoxVMService.

Andy