Our SharePoint 2013 Enterprise server all of a sudden stopped redirecting to the actual .aspx pages of the site when we have navigated to just the server name or folder names. When I go to “ http: //myservername: port/sitepages/home.aspx” the page appears. If I go to “ http: //myservername: port/ ” the page does not redirect, and instead shows a 404 error in Internet Explorer and shows a blank page in FireFox and Chrome. Some googling led me to this answer , which worked for me, but I realized there really wasn’t good documentation that could help me in solving this. Finally, I found a solution that worked for me. There are some deals that are added to IIS few of those are related to SharePoint and few related to.Net. I am not sure about the reason why SharePoint DLL’s are removed from there but adding those DLL’s back resolves this issue. Following are the steps that are to be followed to resolve the issue: 1. Open IIS Manager (Start > Run > inet