I wrote an asp.net application with default.aspx. When I hit this page It is asking me windows login popup window. My application should me windows authentication required b
You would want to disable anonymous access and just use "Integrated Windows Authentication".
Then in Internet Explorer go to Tools -> Internet Option -> Security -> Custom Level -> Scroll the whole way to the bottom and select "Automatic Login with current user name and password” -> OK -> OK -> Close and reopen browser.
This should allow an AD authenticated user to pass straight through to your page.