Redirect to ads

Hi everybody! I faced with redirect from my browser (chrome, opera, both).
I suspect some virus soft, but I don’t know how to remove it from my pc.

BTW, I have Avast Internet Security but it allow to install that maleficent soft…

Sometimes I have seen that pop up banner (I’ve attached screen).
Maybe somebody had this problem? How you fight it?

Run AdwCleaner http://www.bleepingcomputer.com/download/adwcleaner/ and attach the log

next, there may be some leftovers to remove

follow instructions here https://forum.avast.com/index.php?topic=53253.0
we need Malwarebytes and Farbar Recovery Scan Tool logs, attach the logs, 3 logs total

see below the box you write in … Attachments and other options

a malware expert will then assist you later today