I’ve run browser scan, avast says the browser is fine - when it is not.
It detects and removes the browser hijacker in PUP-mode (not installed a la default).
When infested seek qualified removal help here: see: https://forum.avast.com/index.php?topic=53253.0
Produce the logs and wait for a qualified malware removal expert to arrive in your thread,
This will probably be to-morrow as it is midnight now in CET
and the European theater is where most of our volunteer avast webforum qualified removers reside.
polonus.