IE7 on Vista will refuse to download a zip archive containing an hta script.
(Direct download with adress ending in .zip - It works on other, non Vista non IE7 computers.)

Does anybody knows how to fix that?

Thanks.

Maybe you have a special IE config (tweaks) that do this? Hard to guess.

It would help a lot having more details, like an error message reported by IE ("download blocked" or whatever it might say), or a server error page or number. It's hard to just guess without any details.

Or then again, maybe it's something with IE itself (dunno, the only time I ever use it is to download Firefox on a new box)

No, we thought it was an IE or Vista "tweak" but it was our antivirus.

Problem solved.

Thanks for your reply DrSnurb