keep getting virus threats

been using avast! for about a week now since my computer was running really slow and ever since i installed it and let it run the scanners there’s one that it can’t seem to get rid of. it’s basically from chrome everytime and different sites such as “theparenttrace” “files2share” etc etc etc, i get atleast 20 while on the computer for around 10 minutes, sometimes without even opening chrome itself… any help would be appreciated! thanks in advance

edit: sorry i think this in the wrong section.

https://forum.avast.com/index.php?topic=53253.0