VST Transit lockup

I reinstalled C8.5 including vst transit.
I updated my steinberg key.
On startup at the point where vst transit is initiallising I get the message from windows,

"Cubase 8 has stopped working

A program caused the program to stop working correctly.
Windows will close the program and notify you if a solution is available."

As far as I know all latest drivers are installed. Is there a quick way to check this?