Unable to access the IIS metabase

When you change web hosting enviroment in Visual Studio 2012 from build-in IIS Express to locally installed IIS 8, this error message may occur.

Simple solution: Run Visual Studio "As Administrator", even you are local Administrator.

SharePoint 2010 error: The user does not exist or is not unique

Simple solution for SharePoint 2010: 

Everywhere You will be prompted to specify account credentials, set it in full format [COMPUTER NAME]\[UserName] or [DOMAIN NAME]\[UserName].