PowerShell command to disable the loop-back check

When you use a custom host header to create web application in SharePoint and  browse it from a local machine that is running Microsoft Internet Information Services (IIS) 5.1 or a later version, you may receive an error message that resembles the following:

HTTP 401.1 - Unauthorized: Logon Failed


To resolve this issue execute the following PowerShell command to disable the loop-back check

New-ItemProperty HKLM:\System\CurrentControlSet\Control\Lsa -Name "DisableLoopbackCheck" -value "1" -PropertyType dword

Session state has been disabled for ASP.NET. The Report Viewer control requires that session state be enabled in local mode

You might have seen error when you try to add Report Viewer web part in SharePoint 2010. 

Solution: Open 'SharePoint 2010 Management Shell' and run this command. It should resolve this issue.

Enable-SPSessionStateService –Defaultprovision