Depending on your browser, you can follow the steps bellow in order to uninstall this toolbar:
Google Chrome and other Chromium-based browsers: type chrome://extensions in the address bar. Press the thrash can icon next to the Kiwee Toolbar.
Firefox: press Shift+Ctrl+A (or open Tools → Add-ons). Press Disable next to the Kiwee Toolbar. If you can't find the toolbar in the Extensions tab, switch to the Plugins tab and look there.
Opera 12.x and older: press Ctrl+Shift+E (or press the Opera button → Extensions → Manage extensions) to open the Extensions menu. Press Uninstall next to the Kiwee Toolbar.
Internet Explorer: open Tools → Manage Add-ons. Select the Kiwee Toolbar and press Disable.
If you still have issues after, try running a copy of the AdwCleaner application. It will scan known locations in your computer for toolbars and browsers add-ons.