Tipstar, try to make scan in safe mode (check how to do that for your OS), because in such a mode malware is much easier to remove in some cases. I recommend you try scanning with your AV, even though it doesn't seem to be doing its prevention job well - but Malwarebytes should be helpful, just before scanning make an update of its database.
I try to access crypto-webminer but my AV has instantly blocked that page because od JSCoinminer Website 5, which means that the owner wants to use the power of your processor through your browser to probably mine Monero.
A possible solution can be found at this link, and it consists of uninstalling the browser you are using and then manually deleting certain folders. Read carefully before the procedure and save all important data from the browser (bookmarks & passwords).
https://www.infopackets.com/news/10316/how-fix-remove-jscoinminer-browser-malware-step-step