Well, my experience with cbr/cbz readers is pretty limited, but since learning about this stuff with CDisplayEx, I've been using a program called ComicRack. I love it. It has just the right amount of features. It seems malware free. Though, I haven't run a scan or anything since installing it. But, it seems popular enough that you'd think if it did have nastiness piggybacking on it, that this would show up in a search - which it does not.