Malware/Ad Popup on one particular site

[pbcsd]

So have been struggling with a really odd issue. When I access one site on the web, one that I use a lot (www.avsforum.com), a few days ago out of the blue, after a minute or so the website would change to a spoof site claiming to be McAfee and that I had a virus, should scan the computer, etc. I ignored it, ran Malwarebytes, which found some Altruistics thing on my laptop and quarantined it. Checked my Chrome Extensions, nothing unusual there. Went back into Chrome, and boom, same thing happening.

Then tried another malware remover (HitmanPro), found some stuff Bytes didn't, but still didn't help. I then did a Tron job (via Reddit) which is supposed to be a much more invasive scan and removal tool. Also didn't help.

Finally, installed an adblocker extension (uBlock Origin Lite), and it seems to be blocking the ad from popping up as it doesn't happen anymore. But if I turn off hte ad blocker, it comes right back, and I'd rather get rid of the culprit.

Weird thing is...I tried Microsoft Edge which is a browser I never use, and received a different issue, with teh exact same site. Basically also results in a pop up except a different looking one (see both below).

At a bit of a loss to know how I can get rid of whatever it is that is causing this?

Chrome:


Microsoft edge:

 

[icotonev]

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Please follow the following instruction ..:

Download Farbar Recovery Scan Tool and save it to your desktop. --> IMPORTANT

If your antivirus software detects the tool as malicious, it’s safe to allow FRST to run. It is a false-positive detection.
If English is not your primary language, right click on FRST.exe/FRST64.exe and rename to FRSTEnglish.exe/FRST64English.exe

Note: You need to run the version compatible with your system. If you are not sure which version applies to your system download both of them and try to run them. Only one of them will run on your system, that will be the right version.

• Double-click the FRST icon to run the tool. When the tool opens click Yes to disclaimer.
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• The scanner will produced two logs on your Desktop: FRST.txt and Addition.txt.
• Please attach the content of these two logs in your next reply.

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In your next reply, please include:

• FRST.txt
• Addition.txt