Pop up Ad that wont stop

Hello Pat,
Thank you for reaching the AVG community support forum.
We regret the inconvenience you had with constant pop ups from McAfee. We'll certainly look into this and help you. For further clarification, could you please help us with the screenshot of the pop ups you get?
| AVG (https://support.avg.com/SupportArticleView?l=en&urlName=avg-create-screenshot&q=screenshot&supportType=home)
Thank you in advance!

Hello Pat,
Thank you for reaching the AVG community support forum.
We regret the inconvenience you had with constant pop ups from McAfee. We'll certainly look into this and help you. For further clarification, could you please help us with the screenshot of the pop ups you get?
| AVG (https://support.avg.com/SupportArticleView?l=en&urlName=avg-create-screenshot&q=screenshot&supportType=home)
Thank you in advance!

I am very frustrated…I cannot stop an ad pop up for Macafee (define the irony!). from the following address:   www1-notifinextads.azurewebsites.net 

How do I stop this???  Literally every 30 seconds it popes up again.