There is a well known issue among PHP developers regarding WampServer and Skype, You may find difficulty when using Skype and Apache server on the same computer at the same time. Your Apache server may not respond, its services may not run properly.
Both the Apache server and Skype are using port 80 for their service and hence the conflict occurs.
I have just discovered 3 simple methods to solve Wamp and Skype conflict.
Solution: 1 (from Skype)
You have to change the port number of Skype application manually is the first method.
Open Skype -> Tools -> Options -> Advanced -> Connection
And uncheck option “use port 80 and 443 as alternatives for incoming connections”, and SAVE. That’s all.