Hi James,
I knew this would come up, Since I have had the same problem myself with all three of our machines. I do believe it is the Microsoft firewall it is a bit over zealous at times. I also run Zone Alarm that does give a warning for some false positives.
To this day we click the icon and it will try to install the latest version and stop. I just click the icon again override the first call for the room bring up the task manager and end the first session.
Sounds like a lot of work but it really isn't it just takes o lot of words to explain it though.
If you need more assistance My Skype is ~ onomoney
This is what I recieved from HotConference to remidy the down-load problem.
Hot Conference Help
I believe that you may need to re-install the software; I think there might
have been some corruption on installation.
Please follow these steps in order to successfully re-install the
software.
1- Backup your existing list of rooms (available in the rooms dropdown box
when you initially log in) by moving the following file to your desktop:
C:\Program Files\Conference\Conference.db
2- Uninstall HotConference from "Add or Remove Programs" in your
windows Control Panel by selecting the "Audio/Video Conference"
option in the dialog box.
3- Delete the following folder if it still exists: C:\Program
Files\Conference\
4- Delete any icons and archives of HotConference you might have on your
desktop except the "Conference.db" file from step 1.
5- Make sure ports 32768, 32769 are open in your firewall or anti-virus
software for both UDP and TCP.
6- Exit any firewall or anti-virus applications that are running. (you can
turn them back on after download)
7- Download and install a fresh copy of HotConference using your own rooms
or if you like, you can use this default Public Room URL:
http://hotconference.com/software/downloads.php
8- Move the "Conference.db" file back to your C:\Program
Files\Conference\ Folder when you are done.
That's it. You should now have a fresh, updated copy of HotConference
installed. If you're still experiencing problems, please, send us an
error message and/or screenshot so we can attempt troubleshooting.
Brad West
onomoney