I have the exact same problem. It started after I downloaded Malwarebytes and it removed several trojen agents. The agents kept allowing pop ups even though the pop up blocker was on. Now, I have the pop up blocker at maximum and it keeps giving me warning signs that pop ups were stopped. Even when the program is just wanting to open another window. Example yahoo.com. I click on a yahoo clip and the warning window comes up saying it blocked it and wants to know if I want to allow it once. The maywarebytes window continues to say 162.210.192.21 (the last two numbers change to a few others) was blocked. Do I follow the instructions noted in this thread?