Apache: i can see the website but nobody else can

i installed apache into the default directory.
i changed the config so that my documents are in my apache\realdocs folder.
i make a shortcut of .........\apache\apache.exe -k start like it says to do in the instructions but my friends say it brings up a blank screen saying it cannot be found. i also tried just double clicking on apache.exe but still none of my friends can see it.

when i type in my ip of http://142.59.44.149 it brings up the page i created, all the links work and everything works fine. wtf is wrong??

Windows has started.
Would you like to play another game?