What do I do if I have a harmful virus?
One day I just opened a link(said something about "watch this for free!").I wasn't sure if it was like pirating movies or something. I clicked on something on the website (from the link) and I guess it gave me a virus because this notification (picture below) happens when I use google. One has popped up before saying something about turning on incognito because of third parties. I did turn on incognito. I have already shut down my computer before with no problem(well it died on me with low battery). What can I do to get rid of this? I didn't call the number yet or anything, should I? I don't know how to get rid of this virus. Please help me.
MacBook Pro with Retina display, I have a Harmful virus-erases data