And some are downright impossible to get rid of. I ended up with Conduit tool bar with something else called VisualBee. Despite taking it down from the control panel, despite correcting the 'manage add-ons'--it still persisted--taking over as my home page and search engine.
In the end, the quickest and safest means to get rid of it was to Reset Internet Explorer Settings. (Internet Options > Advanced > Reset Internet Options) That restored Internet Explorer to the default and from there I could restore my desired homepage. Less then ten minutes time. Nothing of substance was lost--no lost documents, no lost favorites.
Then I ran AdwCleaner and that deleted all of Conduit's and VisualBee's associated registry keys.
And even if a person checks all the boxes to decline something, it still forces itself onto the computer. And Conduit is not a virus, nor is it malware--so running antivirus or malware programs won't get rid of it. Conduit is a nightmare scenario people fall into; instructions for getting rid of it run the gambit from finding and deleting its registry files--a tricky proposition always to the ineffectual running of anti-virus or malware programs.