IIS Unauthorized Error

After installing CRM, I continued to get a 401 Error message when I opened the CRM web site.  I quickly realized this was not a CRM issue, but an IIS issue.

Error Summary:
HTTP Error 401.2 - Unauthorized
You are not authorized to view this page due to invalid authentication headers.

Detailed Error Information

Module	IIS Web Core
Notification	AuthenticateRequest
Handler	PageHandlerFactory-ISAPI-2.0
Error Code	0x80070005
Requested URL	http://localhost:80/loader.aspx
Physical Path	C:\inetpub\wwwroot\loader.aspx
Logon Method	Not yet determined
Logon User	Not yet determined

Fix:
To fix this error, open Server Manager and expand Roles.  Then select Web Server (IIS) and select Add Role Services from the right hand side.  When the wizard pops up, scroll down and select Security.  This specific error relates to Windows Authentication not being installed, but I selected all items under Security to ensure I did not run into any other errors.

Side note - this is my first post published by Live Writer.  Very nice!