Second MS Explorer annoyance

Second Internet explorer is starting up like a pop up.
then the computer locks up. Especially when I try to close that window. Or the window closes and then things work slow like the RAM memory is full.
What should I do. No virus scan (MacAfee) or Counter Spy scan have found any problems. The new explorer that starts is NOT a tab it is a second window. Example today Entrepreneur.com will start automatically How do I get it to stop?
 
sad I’m frustrated
Inappropriate?
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