I am running OS 10.7.5 on my '09 Mac Pro and I have somehow picked up a virus-like pop up. I get an obviously bogus warning popup telling me a virus is present and giving an emergency number to call. Attempts to dismiss the warning page just result in the page opening again. If I quit or force quit Safari the same thing happens again when I reopen it. Also persists after a restart. What do I have to get rid of to make this stop? Thanks for any insights. ps- Preferences are disabled while this happens so I can't even reset and a spoken message is played as well. I tried to take a screen shot but that's disabled for Safari windows as well.