IE : Unable to download * from *. Unable to open this Internet site. The requested site is either unavailable or cannot be found

Question

I have an issue with my website and IE. I have a file Document.ashx that becomes a document from my database depending on the parameter passed in the query

Answer 1

We had this same issue with IE8 using an MVC controller tagged with NoCache. This sets Response.Cache.SetNoStore which breaks file downloads in IE.

To resolve - you can reset the Http Cache Policy via reflection.