Stop port 80 on windows server 2008 r2

Question

I have a server application which listening port 80. But when i start listening,i am taking this error :

Error starting listener on port 80: Address already in use: bind

How can i stop port 80 to use it?

Note : I have stopped "world wide web publishing service"

Answer 1

"SQL Server Reporting Services" is using port 80. I have stopped it and port 80 is usable now.