How to get an Edgeport/1 to work correctly in a vmware virtual machine

Edgeport/1 works fine on host machine. It either periodically drops out in vmware virtual machine or does not work at all. Latest edgeport driver package available (40002537_J) tries to install a newer difxapi.dll into windows/system32 but cannot since that file can only be replaced or deleted by TrustedInstaller. Host and guest OS is Windows 7 64 bit.