Download->http://sourceforge.net/projects/mod-auth-sspi/
Install -> in your wampserver apache/modules
ex: mine was C:\wamp\bin\apache\apache2.2.6\modules
change httpd.conf->
2) add the following line in httpd.conf file
LoadModule sspi_auth_module modules/mod_auth_sspi.so
<Directory "your /web /directory">AllowOverride NoneOptions NoneOrder allow,denyAllow from allAuthName "Login using your DOMAIN username and password"AuthType SSPISSPIAuth OnSSPIAuthoritative OnSSPIOfferBasic Onrequire valid-user</Directory>