I did all the steps for enabling anonymous access to my site, but still this through this error and pops up user id password screen. It was working fin till 3 days back. When we restored the root site collection this is started behaving like this.... :( any solution or suggestion will do great. referred this : http://localgovernmentsharepoint.wordpress.com/2010/06/11/how-to-enable-anonymous-access-to-a-sharepoint-2007-web-application/ Thanks Vivek http://www.redpipit.com