[<SBS 2011 - This web site cannot be started>: SUMMARY]
Cannot start Default Web Site on the server. The 80 port has been taken over by SharePoint – 80 web site
By default, there is no SharePoint – 80 web site in IIS, unless we started the SharePoint farm setup wizard on the server
Remove the SharePoint – 80 web site in IIS directly and then start Default Web Site again.
SharePoint site is not working.