when I want update to CIS 5.3, my antivirus nod 32 detect troian:
1/12/2011 12:08:20 PM HTTP filter file http://downloads.Comodo.com/cis/download/updates/release/inis_1001paid/x32/cfp.exe probably a variant of Win32/Genetik trojan connection terminated - quarantined WORKGROUP-C9A3D\admin Threat was detected upon access to web by the application: D:\Program Files\Comodo\Comodo Internet Security\cfpupdat.exe.
This is a false positive that NOD 32 needs to fix. I would suggest reporting it to them.