http://blogs.msdn.com/xwebsupport/archive/2009/06/12/error-1406-when-installing-expression-web-2.aspxThis is another frustrating setup error. It happens during the install of Expression Web 2 and always kills the installation dead in its tracks. The 1406 error means  that the Windows Installer has been denied permission to write to one or more registryen-USCommunityServer 2.1 SP1 (Build: 61025.2)