Try 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.
It's recommended to run AdwCleaner again even after the first run. This will ensure that the component is removed correctly and there are no traces of it any more.
