just look how large your comodo folder now is.
after reinstall for updating i have 68mb,
but with using the updater inside the comodo my folder was suddenly over 250mb.
i didnt used the antivirus.
It has nothing to do with using the onboard installer or the standalone installer...
68MB is the size before the AV database is downloaded. This database is around 106MB. So after you download the database, you're sitting at over 170MB regardless of your update method.
Even if you only install the firewall, it wants to perform a system scan to ensure your computer is clean. In order to to this, it needs to download the AV database. So even with a firewall only install, you will end up with a large folder.