May I know what is your operating system derivatives? Is it windows 8? If possible run it as administrator.
Run the WAMP, never mind if it does not start. press alt+ctrl+del ==>click on the task manager.. look for the Apache, mysql, phpMyAdmin ( there should be some application running similar to this).. If you don't see it.. close the task manager.
On your desktop, right click on the wamp shortcut icon, select properties=>click on compatibility tab=>scroll down and then tick => run as administrator.
If you are running windows 8 , flick on the right hand side corner of the screen, touch search icon, type wamp. On the search result shown on the left, single tap wamp, in the bottom of the screen double tap on the "run as administrator".. Your case might be different if you don't have a touch screen. Replace the flicking and tapping with clickings instead.