For those of you looking for a way to install this or just parts of it silently, I found these switches on the Comodo forum. First extract the msi by running the CIS installer and ticking the 'Dont install yet' (or something like that) box. Grab the msi and: I tried this on mu Win7 Ultimate 64bit and it worked a treat. Did have to reset pc to see the icon in the tray though.