Just wanted to update.
As I have the Comodo paid version it comes with online support. I let them have remote access. First tech increased virtual memory setting and thought this would be the answer.
It was not. May be slightly less slow. I started a new session. That tech started remote access and uninstalled and reinstalled Comodo Internet Security 2012. That seems to have corrected things.
cmdagent.exe is now doing whatever it is suppose to do and not is hogging the CPU.
As the problem with cmdagent.exe has bothered others over the years it must be something in the basic architecture of comodos software.
I have no complaints though. CIS seems to offer a good level of protection and when I had a problem their tech was right there to fix things.