I\'ve uninstalled my WampServer 2.5 and installed version 3.0 But apache service isn\'t running and tray icon is orange... Clicking on test port 80 gave me the following cmd
There is more than one service that could be causing this. Try opening cmd or PowerShell (remember about administrator rights) and run:
NET stop HTTP
It will stop service that is running on port 80 and will display every service that was disabled to achieve that, simply disable that services for future and that should solve your issue.