I tried making that change to my php.ini file (cgi.fix_pathinfo = 1 and cgi.force_redirect = 0) and restarting IIS and it made no difference. I have reinstalled, and downloaded a fresh installer and reinstalled. Still the same. When I log in I just get left on the wp-login.php page with a blank screen. There seems to be a view on the forum that blank screen issues are memory related. I have set memory_limit = 256M in my php.ini file as well and that made no difference.
I am going to delete everything, including my database and the site from IIS and start again. If anyone has any other suggestions I would be grateful.
Howard