Please go to Services panel and locate the one named World Wide Web Publishing Service (it is w3svc in fact). Right click on it and go to Dependencies tab. There you can see which services that it relies on and from then on please check if they are running.
I suggest you execute the following commands as they should bring up those services,
net start http
net start was
And if they are both running, you can execute
net start w3svc
again.