From: No Spam on
ToolbarCop is a browser extensions manager which can disable or
eliminate the following browser add-ons selectively from Internet
Explorer:

Browser Helper Objects (BHO)
Toolbars
Standard Toolbar buttons
Context menu Extensions
Download managers
Protocol Handlers
Horizontal / Vertical Explorer Bars (side-search bars)

Startup applications originating from RUN registry keys.
http://windowsxp.mvps.org/toolbarcop.htm