Vista IE7 .zip files download problem

Lately, when I try to download a .zip file or similar with IE7 instead of asking for a download location the file just downloads and tries to automatically open.

Any ideas as to why this is and how to return to the old defualt behaviour?

I have checked for virus and spyware but my system seems clean so I must have changed a setting somewhere, although I do not recall doing so.

Thanks for any help,
Jason.

FWIW, my computer started doing the same recently without me making any changes, under Vista 64. Perhaps a windows update did something squirrely?

try looking under explorer->file types/associations (or something like this) and changing the default action for .zip files... but since its on explorer, I really dont know.

I quick fix would be to change to a decent and more secure browser, like Firefox ;)

.