Doesn’t show windows authentication in IIS 7

Recently when I try to deploy my web application to newly setup windows server, in the IIS it doesn’t listed the windows authentication option  under authentication

In order to have listed windows authentication you need to install it by going to the Server Manager and checking Windows Authentication Check box

Server Manager—>web Service--->Add Role Service

Note : - In this machine already installed the Windows authentication .other wise check box will be enabled.

404.2 The page you are requesting cannot be served because of the ISAPI and CGI Restriction list settings on the Web server

recently I got this error when I deploy my asp .net application to the IIS.Reason for is that by default iis 7 didn’t allow ISAPI and CGI.There fore you need to allow those properties manually by using actions pane