Why do web pages often jump automatically (unhealthy websites)? What should I do?

There are many reasons. One is that your computer may have seen unhealthy websites. The second is that there is a Trojan horse in the computer, maybe both! Suggestion: You can download Jinshan Net Shield, copy the URL when that webpage appears next time, then open Jinshan Net Shield and paste the copied URL into the blacklist, so it won't appear again in the future! I hope you can have a good time and have an ideal and clean Internet!