I admit it...I'm a little paranoid. However, I fear my Mac could possibly have a Trojan. Recently I've noticed several things being denied through "Little Snitch." This includes the XProtectorUpdater and Google software updates. I have heard of a new Trojan that does such a thing. I'm not sure how to go about checking for a Trojan and I haven't seen any other suspicious things taking place. I do have a free edition of Sophos antivirus. Although its the free version, I would think it would recognize most things. So how would I check for a Trojan and how would I handle it? I imagine I would have to re-run the OS (I have done that before on a PC), but I'm not sure how to work that either. Thanks in advance!