Checked how I was logged in - set up as admin. Right clicked on the short cut and chose run as admin - worked!!!!!!!!!!!!!!! Had a couple of annoying vista popups but got through them. Played for a few minutes and crashed to desktop - restarted again and played for awhile without any issues. So far having fun, camera takes alot to get used to and to perfect view even with using the mouse. No anomolies with graphics, game looks good at max resolution for my card.
Thanks Martin