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.
Restart the PC and then start Revo again then look for the driver/software. It shouldn't be there.
After that, try running AdwCleaner to make sure that there are no leftover rogue registry keys or toolbars in your system. If there is something related to malware or adware, AdwCleaner will remove it.