I've seen other posts on this problem and have followed the "solution" instructions but they are not working for me.
Yes, I've uninstalled Firefox using Programs & Features (telling it not to save old settings/preferences). Then I've downloaded a fresh copy from Mozilla. Then I've uninstalled NIS using Programs & Features and then downloaded a fresh copy. I've then run Live Update and restarted my computer as directed until it said I had an up-to-date version and no more updates were available. Still no Toolbar. And it is not listed in the add-ons either.
Any other thoughts???