My browsers are also being redirected, somewhat randomly. It almost seems deliberate somehow to ignore these problems. Or else the "pros" on this website don't really know what they're doing! Most issues seem to end in nonsense and miles of analysis codes anyway. Eventually people just give up waiting and do the only REAL solution: Backup and re-install.
So many people have this problem, there must be a tool out there that can fix this! Something that resets ALL DNS settings and at the worst you might have to re-install your internet connection. In my case I think I have eliminated the cause of the problem but it is still resident somewhere.
I'm not sure why we are being ignored, I posted a week ago today, by the time I have an answer here I may have already formatted, like most here. That usually works.