If you attempt to browse to a website on your local machine identified by a host header that differs from the NetBIOS name of the computer or if you reference your server via its fully qualified domain name (i.e., server.domain.local) you may be presented
Read More...
Read the complete post at http://blog.devstone.com/aaron/2008/06/12/Troubleshooting4011AgainstIIS60AndIntegratedSecurityOnLocalMachine.aspx