Our application enables our customers to download files to their computer. The way I have implemented it is using asp.net with a dropdown. When the user clicks the dropdown they get the choice of "PDF","Powerpoint", and a couple of other choices depending on circumstances. Then, in postback depending on the choice the user made, it will return a file (changing the content-header and such and then bitbanging a file to the user). This works perfectly in all browsers, but IE7 complains that this is a security risk and blocks the download. Is there any way for the users to authorize downloads from our webapplication?