sadly i have the same problem. the solutions arent't really interessting for me, since i use only comodo for about the last five years, have no other sec software...so its a cmd problem!
the only way for me to use comodo right now, is to start the diagnostics right after rebooting, then close cmd and start it again. it then works properly, but not before...i have to do this every single time i start my pc.
re-installing does nothing!
to an unrelated topic cmd often blocks some programs associated with the explorer.exe without asking or anything. anytime cmd does that i have to reboot, too. following the above described procedure.
i even defined the associated programs as trusted apps but cmd blocks them anyways! no way to interfere...
to sum it up, since cmd updated to "premium" i am really unhappy with it. doesn't work properly, has so freaking many problems that always lead to rebooting therefore leading to all the stress again.
in some cases from my friends, to whom i usually recommended cmd, they couldn't even start their pc anymore, till they de-installed cmd per "safe-mode".
please make a workaround! fix your problems and make cmd the great firewall it was before, cause as for now, its just so much trouble!