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.
Once AdwCleaner finished scanning, reboot the computer then download a copy fo Combofix. Combofix will use more aggressive way to remove the application in case AdwCleaner fails to do it.