CyberDefender Corporation doesn't provide any support in order to uninstall CyberDefender. The company was purchased in 2012 by USTechSupport which provides on their web page some uninstallation guides to similar antivirus products. Also you can try to uninstall it using Revo Uninstaller. Even if it can't uninstall the application normally, it will force it to uninstall by wiping out all traces of its presence from the system.
After that, try running AdwCleaner to make sure that there are no leftover rogue registry keys or toolbars in your system.
