Threat detected - s.vb3k.com/crossdomain.xml

When navigating to any website, I’m getting the Threat detected - s.vb3k.com/crossdomain.xml popup message from AVAST.

How to recive help instructions https://forum.avast.com/index.php?topic=53253.0

Malwarebytes Scan Log

FRST Logs

aswMBR fails with a popup: avast! Antirootkit has stopped working. When I click the ‘Close Program’ button, the application stops

MBAM didn’t detect malware, but I’m still receiving the “Threat detected - s.vb3k.com/crossdomain.xml” popup