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The "logs to assist in cleaning" tells me to open "Malwarebytes Anti-Malware" and you ask me, Pondus, about the popup warning, so before opening it, I rather wait for your answear about the popup.
as i said above [b]IF[/b] you want a check of your computer, follow instructions in that guide and from the avast popup you attached above, it seems you may have some crap in your computer

the guide will tell you to download Malwarebytes and Farbar Recovery Scan Tool
when you have done a scan with these tools (according to instructions), they will provied scan log(s) … 3 logs total
These logs you attach here for a malware expert to see … he will then give instructions on how to remove any infections, if he see any