I'm getting a message telling me a virus is installed on my computer
I'm getting a message telling me a virus is installed on my computer and that I should call 1-647-360-4456 (Macy Report) to get further instructions. My Safari browser is rendered unusable because the popup won't go away. I have an iMac with a Mac OS X 10.7.5.
iMac, Mac OS X (10.7.3)