v3.5 is inherently dangerous and will compromise your system's security if you install it. You could try using v3.6.16 which is the previous secure version and still supported: [http://www.mozilla.com/en-US/firefox/all-older.html Download Firefox v3.6.16] Uninstall the version you have now via Add/Remove Programs choosing to keep your bookmarks, customizations etc., and then reboot. Next, delete the Mozilla Firefox folder at this location: C:\Program Files\Mozilla Firefox. If that fails to solve the problem, then I'd advise you to switch to IE8 rather than use an insecure browser. You could also try emailing their site's system administrator for advice. This is their URL: http://whois.domaintools.com/artinstitutes.edu