when swf file shows up on a computer as an unknown file, does that mean the computer doesn't have flash player? or do I need to change my publish settings?
please don't open duplicate threads.
then, please mark your previous thread as answered.
it means there is no program to display swf files on that computer or you need to assign the desired program (like the flash player) to open files with the swf extension.
if you don't know how to do the later, use google to search for help or specify your operating system.