How to fix popup ad from screen in Lollipop OS?

[AC Question]

How to fix popup ad from screen in lollipop OS

After updating my lolipop OS. unwanted popup ad comes on screen. its very annoying. some1 help me to fix it.

 

[B. Diddy]

Re: How to fix popup ad from screen in lollipop OS

Welcome to Android Central! Which device? Was it an official over-the-air system update? What are the popups promoting, and do they only occur when you're browsing?