You could try the Comodo clean up tool
http://forums.comodo.com/install_set...9617#msg259617
"This is a batch file for removing left-over files and registry entries. It should only be used if:
* You can't uninstall Comodo Internet Security
* You can't install Comodo Internet Security
* Comodo Internet Security is already uninstalled, and you want to make sure everything's gone"
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Beat me to it.