7search has (or had, I am not up to date) a browser hijacker. It gets on your computer I don’t know how. It then acts whenever you make a typo in the browser address bar. When you mistype an address it hijacks you to the 7search search page.
It is very annoying. It will keep jerking your browser until you have 7search fully loaded, you can’t escape except by closing the window. When I had it I found none of the free spyware removers would touch it and I bought Aluria to help.
That turned out one of the best things I ever bought online.