I was searching the net using Safari on this college funny site when a pop-up appeared. It said something like click here to continue. I had no option of closing the window so I clicked okay and immediately closed the next pop-up window. I'm a little worried because the second pop-up window looked like a regular windows/mac file folder that was downloading something. I'm not sure if it's fake or not. Everything seems to be running fine so far. I have Norton Anti-virus on my Mac. Any insights?