Thanks for the reply, Kyle. Interesting. The Help file says this:
Once installed, Defense+ watches all file system activity on your computer. Every new executable file introduced to the computer, is first scanned against the Comodo certified safe files database. If they are not safe, they are added to the 'My Pending Files' for users to review and possibly submit to COMODO. Apart from new executables, any executables that are modified are also moved to the 'My Pending Files' area.
“My Pending Files” is specifically important while Defense+ is in 'Clean PC Mode'. In Clean PC Mode, the files in 'My Pending Files' are NOT considered clean. For more information, please check 'Clean PC Mode' on the Defense+ settings page.
But in reality the first paragraph above applies only to Clean PC mode, and it's not true for other modes?