I have Windows 8.1 and now understand that I need BC6 drivers to update to Windows 10. Unfortunately I'm not in the US and as I have read that these drivers will only be available in other countries in due course I guess I'll have to wait until they get here. Nevertheless I'm still trying and am currently using BC Assistant to download the latest Windows support software but it seems that I will only know the version that has been downloaded after the download is complete. Hopefully it will be one that works.
I'm sorry, I don't know how to acquire the version information from Bootcamp.xml on my USB.
Thanks again for your help and now I'm going to give it a rest for the day. Maybe I'll battle on again tomorrow.
Cheers
Duds60