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.
If AdwCleaner does not succeed removing the application, try using Combofix. It will use 3rd party tools combined to effectively scan and delete malware or unwanted applications, add-ons, plug-ins, etc.
