Error 2146697211 please contact support
Changing the firewall security level settings to allow all temporarily should stop the activation error message. Once activated you can turn the security level back to Custom.
windows security centre keeps saying that it is still using comodo as my firewall
Have you uninstalled the launchpad as well as I believe this can cause Windows security center to carry on displaying this, but, I'm unsure.
Hope this helps,
Mike