I've seen many similar questions, but the answer never worked for me. Here's what I tried: - stop running as administrator. Nope, neither the shortcut nor the exe were set to run that way. - disable Java Quickstart. Nope, not listed in the extensions or plugings - edit something in registry HKEY_LOCAL_MACHINE\Software\Mozilla\something@something. No, I don't have any Mozilla registry keys. I do have MozillaPlugins, but no match; only @yahoo.com/BrowserPlus. I search the registry and found HKEY_LOCAL_MACHINE\Wow6432Node\Mozilla. [Why has nobody mentioned this alternative path? Very confusing.] Not too much there, but there is a MozillaPlugins with @adobe flashplayer, and @tools.google.com/Google Updater. What can I do? == This happened == Every time Firefox opened