I recently did a system revert, and now everything works fine, except…all my Comodo screens come up blank. I get Defense+ alerts, but they don’t say what they are alerting me about, and when I open the main Comodo screen it is blank as well. I have tried updating Comodo, but it didn’t help.
System restore can sometimes interfere with installed software. In your case I would suggest a reinstall of CIS. :-\
When uninstalling export your configuration to a folder that is not part of the CIS installation folder so you can import it after installing. If you want to keep your Trusted Software Vendor list you can follow: https://forums.comodo.com/defense-sandbox-help-cis/backup-trusted-files-on-cis7-t102711.0.html;msg746841#msg746841 .