CAV Uninstall Issue

I uninstalled CAV but when I go ahead and try to install another antivirus program (AVG for example) I am told Comodo is on the computer and needs to be uninstalled. I have used Revo Uninstaller Pro even after it logged all the install files and folders with the same results. Please help me out of a poorly designed uninstall protocol. Thanks.

Well you could try downloading Comodo Programs Manager and see if its partially uninstalled and if you search the forums i think there is some instructions on how to completely uninstall comodo.
I Google comodo uninstaller

This might help: