IIS Manager Error: The process cannot access the file because it is being used by another process. (Exception from HRESULT: 0x80070020)

When i was tried to open my 80 Port  i got 404 error and checked on the IIS the web site was stopped and when I try to start it the error message "The process cannot access the file because it is being used by another process. (Exception from HRESULT: 0x80070020)" appears, and i solved the issues with a simple method.
There is another application(SKYPE) that is using port 80

1. Open the Skype window, then click on Tools menu and select Options.

2. Click on Advanced tab, and go to Connection sub-tab.

3. Uncheck the check box for Use port 80 and 443 as an alternatives for incoming connections option. 

4. Click on Save button 

5. Restart Skype to make the change effective. 

Enjoy :)