How can I get rid of this security system pop up?

Hello

I'm a new Mac user. I use a Macbook Pro 2009 for a few months now. I have the latest OS X El Capitan version 10.11.2. Today, I started having a MacKeeper icon appear in the upper right of my screen. I uninstalled the MacKeeper application and it no longer appears.

However, sometimes I get this popup:

At risk security system *.

Critical security warning! Your Mac may be infected with a serious attack on this system, such as your IP address to access two different places at the same time. A suspicious connection might be trying to access your connection, Internet banking & tracking of your activity details.

Please contact Support Mac team immediately on + 1-877-547-2712 (TOLL-FREE) and resolve potential threats to your

If you encounter this in Safari, choose force quit from the Apple menu, close the browser and then run it with the SHIFT key is pressed. If the message reappears, disconnect the computer from the Internet and close the tab Popup came.

If you are using another web browser, the instructions vary.

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Tags: Mac OS & System Software

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