My computer is randomly trying to contact Comodo CA. Even when there's no browser open and no particular application that I'm aware of that would need to. Peerblock does in fact block it. The reason posting is that I googled the subject and found so info about ComodoHacker and some of the things he has done. What happens is that every so often throughout the day I get a pop-up saying that the "revocation information for this site is unavailable" or something to that effect. What I am wondering is whether I should be concerned or if it's genuine and should be allowed. Any advice would be greatly appreciated.