Vista? Yes, I think I've persuaded him to get a used computer from somewhere. I'll put an SSD into it if he's willing to shell out for it.
He brought it round this AM.
I've looked at the links thanks and was worried when I didn't find anything in Add-ons. (I was also worried to note in there that part of his Bull-**** had been disabled by FF. ) But no sign of PConverter or indeed, Myway.
Nothing in Programs installed this year that was not known. (or earlier come to that.)
A new Malwarebytes and update produced nothing but "probably unwanted" files. It was about now I noticed he'd not got Ccleaner.
I'd already zapped the cookies in FF, but now I ran a new version of Ccleaner - reset the home page, and so far, so good. Why didn't I do that yesterday? I was always on at him to keep that going.
Mind you, I'm feeling that it's a bit too easy given how much there is posted about it. But I often cause problems by going for a complex answer when an easy one will do.
Now to find out what Bull thingy has to say for themselves.
I'll post an update if all is not well with simple cookie removal.
Thanks again.