

Then install and run Malwarebytes Free for Windows or macOS to zap anything the antivirus program missed.

Start by running one of the best antivirus programs to try to get rid of the PUP, but be aware that some AV programs will not remove PUPs because makers of legal but unwanted programs may sue when that happens. Like a browser-hijacking extension, PUPs are legal in most cases, which makes them no less irritating. But you'll want to track down each PUP and kill it. If you've performed the browser reset, but your search engine and homepage are still set to something you didn't want, or they revert to unwanted settings after a short period of time, then you may have a potentially unwanted program (PUP) lurking in your system that is making the changes.
