when you uninstalled, did you get rid of everything php/apache, all dlls, php.ini's, my.ini's, config files, everything, search for php and apache, there are likely some of these files hiding before you installed foxserv, i have installed foxserv on numerous machines, not cuz it's the best way to do it, but cuz it's fast and manageable
do you have any other webservers running like IIS, that is making things crazy