The Microsoft forums have been the most help.
Having installed a new USB 3 card and which is SATA powered. The MS forums said that it was probably the ASMedia USB 3.0 eXtensible Host Controller, which was right so disabling this in control panel meant that the Renesas USB 3.0 Hub could connect.
So I Windows shows in Devices that the Kinect 2 is connected to USB 3.0. The Kinkect Configuration Verifier still shows a red cross for USB, but displays depth and colour working in a live feed.
The sample SDK program 'Body Basic' now works and picks up and displays my IK motion. But Brekel Body Pro 2 crashes on opening.
This is the print from the crash.
Problem Event Name: APPCRASH
Application Name: ProBody2.exe
Application Version: 0.0.0.0
Application Timestamp: 54f4828c
Fault Module Name: ProBody2.exe
Fault Module Version: 0.0.0.0
Fault Module Timestamp: 54f4828c
Exception Code: c0000005
Exception Offset: 000000000000c780
OS Version: 6.3.9600.2.0.0.256.48
Locale ID: 1053
Additional Information 1: e938
Additional Information 2: e93893afc918378339b83b702db6acd6
Additional Information 3: 8f44
Additional Information 4: 8f4439d79271702a7176a72d853a7606