Such toolbars can be uninstalled using the mechanisms provided within your internet browser(s), though the specific instructions depend on the exact browser(s) you're using, including version number.
John
I have written the company through feedback & customer support, no reply. I went to Control Panel to uninstall Smart Defrag and it will not get rid of the Iobit.com toolbar. Smart Defrag is gone, but IOBIT toolbar is still there. How the he**ll do I get rid of that?

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic