Yes, the free combo is the Comodo Internet Security Premium.
If you mean healing a Windows system file, i.e. remove the virus and leave the cured file alive then CIS cannot do this - it just deletes an infected file. I do not know if the Comodo Cleaning Essential can do this, may be other guys can say about the CCE.
All installers have the same capabilities after install whether it be the Antivirus/Firewall you will have the option without downloading another installer.
Go to the Start menu>Comodo>Comodo internet security>Add/remove components>Next>Change (See Screenshot) and tick the components you require then click next to continue.
Alternatively go to the Control panel Add/remove programs and proceed from there.
Note: It is recommended to run both components from the same installer.