Norton Toolbar works on my laptop (HP Envy 17 - 3D), but not my desktop (Dell XPS 7100). Following are the basics of the operating environments and program versions. Dell XPS 7100: AMD-chip; Windows 7, Home Premium w/ Service Pack 1; FF 4.0.1; Norton Internet Security 2011, v. 18.5.0.125. HP Envy 17 - 3D: i7-chip; Windows 7, Home Premium w/ Service Pack 1; FF 4.0.1; Norton Internet Security 2011, v. 18.6.0.29. I have run liveupdate every few minutes, but still the Norton Toolbar is not updated. When I check add-ons Norton Toolbar 5.5 is disabled; but my laptop add-ons shows Norton Toolbar 5.6, and IdSafe and SafeWeb are definitely present and working on the laptop.