I've solved this today!! If you are on Windows, You go to
"Control Panel" >> "System And Security" >> "Administrative Tools" >> "Component Services" >> "Services (LOCAL)"
Now, since you are using WAMP and not IIS you should disable the "World Wide Web Publishing Service" and the "Web Deployment Agent Service". You are good to go.
If this doesn't work you probably have Skype using Port 80 (if you actually have Skype). (If you have IIS installed you should also disable it. But if you don't have it installed you shouldn't worry!)