When downloading a file in Internet Explorer an unusable "download box" pops up, and then immediately pops up a "Do you want to run or save this file?" box over it. Since nothing can happen in the "download box" until you've selected an option in the second box, there is no reason to open it until a choice has been made.
Pop up the box only after the user has made a choice. Retrieving information may be included in box, with options greyed out until received.
Image description ( http://img222.imageshack.us/img222/5365/37999762yz0.png )
1.) The download box pops up, you can not interact with it
2.) This save/run box pops up immediately after, you can not interact with the window behind it
X.) The background window finaly become usable.
A.) The first Window that should be seen, since you can not interact with the background window it should not show up until you can
X.) The background window only shows when it's usable.