thanks, it was a long process changing the search engine was fine for one tab, as long as you didn't open another tab yahoo was still there lucking. i down loaded the malwarebytes and it found files!!! so i deleted them. eventually with more fiddling i've got chrome and google how i want them.
how do i know and check that i've removed every last bit (thats a bad pun! ) of yahoo??
this started when i downloaded VUZE , which wasn't what i really needed (
the vuze programmer needs a good shake.....
Malwarebytes should have taken care of the important parts. You can also have a look with EtreCheck and post the report here.
Torrent clients are a source of trouble, unfortunately. Vuze and uTorrent should be avoided. I used to unconditionally recommend Transmission, but they were negligent as well when they were infected with ransomware, although they should now have their house in order, hopefully.