Okay so a continuation from this question, where you experts intro\'d me to WAMP, which can basically execute PHP within a Windows XP environment.
So now I\'ve got i
Most of the time this problem happens because of conflict between apachi servers, or ports, or duplicate of wamp installation
So to fix that:
First of all if you are using SKYPE try to change the port by opening Skype, then:
second if the problem still exists try to find if you are using - or was using - other Apache server (for example XAMPP server), if so try to remove it and after removing it, go to regedit by: