So yesterday i got pop up question when opening youtube in bottom right corner of my screen. The pop up message text is “How confident are you that if your account on YouTube was compromised you would know where to go to fix it?” and there is about 5 question in radio button. I am not sure if its a random survey question from youtube or malware/adware/phishing that infected my browser because my avast didnt detect anything. What do you guys think? And this pop up only show 1 times and i close it without answering, its never show up anymore.
Nothing to worry about.
Can avast detect malware/adware/phishing from google chrome ?Yes! Make sure that[b] "FILE and Webshield"[/b] are activated...
Yes File and Webshield is always ON, i never turn it OFF. So this pop up come from youtube and its not a malware/adware/phishing right ?
Maybe but always stay safe.
Is there anything i can do to make sure this is safe ?
Because avast did not detect anything so i think its safe right?
To make sure you are not infected downloadhttps://www.hitmanpro.com/en-us/hmp.aspx-It is a Ondemand Scanner not a full anti-virus.
It required internet to run the scan.It is a demo version.You can run it with avast…
I use MB to scan and this is the result
https://i.imgur.com/N5pqidU.png
I google it and i think its not adware,malware or etc.
If you are worried, you can have one of our ‘malware experts’ take a look just to be sure. Follow the directions given. 
https://forum.avast.com/index.php?topic=194892.0
PUP.Optional.DefaultSearch
https://blog.malwarebytes.com/detections/pup-optional-defaultsearch/
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PUP.Optional.DefaultSearch is Malwarebytes’ detection name for a family of browser hijackers targeting Chrome, Firefox and Internet Explorer.
Note that avast PUP detection is default off
also note that what one security vendor consider PUP may not be so by another, depending on what criteria they have for classing something as PUP
PUP possibly unwanted isn’t necessarily malware.