How do I stop annoying pop-ups?

Hi George,

I really apologize for the inconvenience caused. The pop-up message is a temporary campaign for 'AVG PC Tune Up'. You can either click on the pop-up message to install 'trial' version of 'AVG Pc Tune Up' or you can ignore the pop-up message.

Thank you.

George, Have a look @ this link (https://support.avg.com/answers?id=906b0000000DJTlAAO).
AVG Guru

The question is in the topic.

I keep getting annoying pop-ups such as reminding me that it is a new school year.

How can I stop this?

As the man said, very disappointing.

George