I'm working on a laptop (Vista Business) that will not allow us to download file with IE7. Can't install FireFox (obviously) and customer can't use IE8 due to work restrictions (Windows update hangs anyway). The installer process starts running (CPU ~50%) when download hits 99% but it never takes off. I've cleared the cache and deleted all temporary files (have NOT deleted temporary internet files folder s suggested in another post). Customer cannot open PDF or ZIP files either.
Customer is running CyberDefender and an expired version of Norton 360. I can't uninstall Norton - the uninstall process gets to the end and hangs. I have disabled all firewall and other "features" in both Norton and CyberDefender. I don't know anything about CyberDefender.