Wander Burst Ads

2 weeks ago and today’s morning my PC was infected by Wander Burst Ads. This is good article http://howtoremove.guide/remove-wander-burst-ads that helped me to remove this malware. But… I wonder: I didn’t install any free software last time, I didn’t download any suspicious files. I didn’t nothing. And more over I didn’t install this stupid extension in my browser! I just set the computer into sleep mode and make it run in the morning. I open new tab in Opera and see this Wander Burst search engine, two banners on the right and left bottom corners, one in the middle of the bottom of the page. Where did they came from? There were many processes in task manager like plugin.exe and the process plugin plugincontainer.exe. Can Avast team create some updates, that will not allow this malware attack any computer?

Thank you in advance.

Can Avast team create some updates, that will not allow this malware attack any computer?
have you turned on PUP scan?

if you want a check or assistanse removing malware

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

below the box you write in here, see Attachments and other options

Do You mean Active protection - Action - PUP?
Yes, it’s active.