If you're shooting down the UAC prompts then that will cause problems. VISS back when it was introduced did in fact run on 64-bit operating systems. Failing that, just ask to have Verizon Security Suite removed from the account (they won't be able to give much in credits since it's a 3rd party program made by McAfee, thus Verizon's already paid someone else for it) and use something such as Avast! or Panda Cloud AV to cover the bases. McAfee Internet Security 2005, like Norton Internet Security 2005 and Zone Labs ZoneAlarm Security Suite, is a suite of Internet tools designed to protect data on your PC and keep harmful data. If the McAfee techs and the Verizon techs cannot figure it out, remove any security programs installed, visit McAfee's Website and run the McAfee Removal Tool, reset your browser back to factory defaults and try it again.
It would also apply if the software opens but does not run fully. Service Packs and System Updates would apply if the installation of the software fails, not the download.
Checking out other things like the HOSTS file and preventitive security software might also be a start. Wiping out the browser settings is often a start since there are many things that can typically go wrong with them. With the Security Suite, if it won't download in the first place it's most likely being blocked by a piece of software. You're making a huge mistake by going down that path. Protect and conceal your computer from hackers so you can surf the Internet safely.
McAfee blocks spyware before it can be installed on your computer, and removes existing spyware. They owe me 300 dollars in credits and I still have no internet. McAfee Internet Security Suite automatically blocks, cleans, and removes viruses so you can surf the Web and download files. All they did was wipe out my browser and left me hanging on screen sharing. I have been thru 6 hours of tech support for the same problem.