pro did not detect pum hijack, but got warning mal , two days ago, and i guess pro let it in, malbytes removed pum hijack today so.
Never heard of a pum hijack.
Care to give some details on the MBAM detection of it, the contents of the MBAM scan log should give the file name, location, malware name, etc.
Note this topic is nothing to do with avast detections or not, but about security warnings and notices in general.
The viruses and worms forum is for avast detections or missed detections, so you should start your own new topic there giving the detailed information asked for.