That worked!! Rookie mistake i guess.
Ok so now it is all working. I can get the default Fillscreen and Window modes to work.
I am using win 10 64bit super stripped down version.
AM 2.5.2 (its actually 2.5.1-1)
Mame 0.204
I am happy with the setup. Going to copy all the config files to a backup drive in case it goes wonky.
Cheers for all the ideas and help.