I feel as though I have seen discussion of this somewhere, but forgot.
Depending on what programs you have installed, when you right click an empty spot on the IE Toolbar, you will be offered to check which toolbars you want to have shown. (For example, Address, Google, Norton AV, Links, etc.). Just the other day I noticed that if I check to have Google Toolbar show, I get Norton. And if I check to have NortonAV show, I get Google.
Now that I know that, I can adapt.
But does anyone know where (in the Registry?) those items can be made to perform properly when checked?