Is it OK to run Comodo firewall and Vista firewall at the same time?

I only run the Comodo firewall on my computer. But occasionally my Comodo firewall crashes and my computer ends up defenseless until I discover what has happened. I am considering adding the Vista firewall as an extra layer of protection for the times when the Comodo firewall crashes.

Will I have any adverse effects if I run both the Comodo firewall and the Vista firewall?

It’s never recommended to run two software firewalls.