I ran into a situation the other day where I was unable to connect to a remotely administer an IIS 7 (Windows 2008) server after installing the .NET 4 Framework. After some checking the steps that I used to setup the server in this blog post, I figured out that when .NET 4 installed it turned off IIS 7 Management Service and unchecked the Enable Remote Connections options on the service.
Once I checked this option again and restarted the service, everything was working again. Strange that installing .NET 4 would have done that… oh well, now I know.
Hope this helps someone else.