I’m having the same problem as Dennis and others, Norton Security is killing it on arrival, saying it contains “WS.Reputation.1” virus. Since I trust the source (and ONLY because of that) I will allow it to run, but even if this is a false positive, I think the author may want to investigate why such a wide-used antivirus would present this report.
If you just right-click Norton’s icon (as mentioned) and select “Disable Auto-protect” that is sufficient to do the job. I suggest only disabling auto-protect for the minimum, which is 15 minutes.