Firstly check to see if IIS is running via services.msc

If you attempt to start the IIS service and it fails you may get the following error message in Event Viewer

The Windows Process Activation Service encountered an error trying to read configuration data from file’\\?\Windows\system32\inetsrv\config\applicationHost.config, line number

If so, navigate to C:\inetpub\history than the latest subfolder and copy the applicationHost.config and copy it to C:\Windows\system32\inetsrv\config\ then restart the World Wide Web Publishing Server and the related others, or reboot the server.