Hi,
This message
Your port 80 is used by a processus with PID = 4
normally means that you have IIS installed on your system.
IIS is microsofts web server and so uses port 80 like any other web server. When installed it starts automatically at system boot and therefore grabs port 80, this means that Apache cannot use it as ports cannot be shared, normally.
If you are not using IIS then I would suggest uninstalling it. You can find how to do that from a google search.
For some reason Microsoft decided to install IIS be default on Windows 10. It is not required unless you are using it and uninstalling it will not cause you any problems---------------------------------------------------------------------------------------------
(Windows 10 Pro 64bit) (Wampserver 3.3.4 64bit) Aestan Tray Menu 3.2.5.4
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