CIS not working on reboot

Hi all,

I am running the latest version of CIS (not pro) and every so often when I boot up my computer, I get the international “no” sign on the Comodo shield in the system tray. Even in this state, I do have internet access but am not sure if it is working. If I reboot again, it returns to normal.

This has happened several times in the last few weeks. ANy ideas what is causing this?

Thanks in advance!