cmdagent issues with vmware

I’m running Comodo Firewall 8.2 with HIPS disabled and VMWAre Workstation 10 on a Win7x64 Intel i5-3570K Quadcore platform with 32Gb RAM

Frequently when I have a VM open, my machine periodically freezes for around 15-30 mins - cmdagent is always at 25% CPU. I cannot kill cmdagent in Task Manager, nor can I stop the service in Service Manager. I uninstalled Comodo and the problem went away. Reinstalling Comodo Firewall and it comes back.

How can this be fixed?