Hi Showtime8000, it sounds as if your browser is not properly patched to protect you against Content-Disposition and Content-Type MIME Header vulnerabilities.

More info can be obtained here: http://www.microsoft.com/technet/tre...n/MS01-058.asp

As well as here: http://www.securityfocus.com/advisories/3744

The only workaround is to install the security patch from Microsoft (this may or may not fix the problem). A more direct yet temporary approach would be to disable all file downloads from within IE's custom security options, and re-enable the file downloads option only when you need to download a file. This however will not protect you from more complex exploits.

Hope this helps!