Right. No access with either Norton DNS nor Comodo DNS. But Google Public DNS did just work for me. Well, it has been a bit hard to get back to the Checkup Tool without being able to get there in the first place, don't you agree? But now that I am able to access it, I find that I don't feel too enthused about downloading and installing a tool that takes 20 minutes to scan my machine (and to do who knows what else), particularly given the suspect results seen on this thread. So, to answer the OP's question, no, I guess I can't. Edit in: Aw, screw it, I'll try it. Edit in Part II:, On 2nd thought, the tool description says that it will, "Automatically conduct a full system scan each week". I'm gonna go with my initial instinct and pass.