Yes, please use the McAfee removal tool, details here uninstall TunnelBear + refer to my canned text below;
Are you aware that Windows 8, 8.1 and 10 have an updated version of Windows Defender that offers the same real time protection as Microsoft Security Essentials, you do not need third party AV protection and by not installing any you are reducing the possibility of potential conflicts and freeing up resources on your computer, information courtesy of admin here
Once McAfee has been fully removed, please check that Windows Defender has been automatically re enabled and allow it to update and scan your computer to make sure that it gets a clean bill of health.