@leocg
Sorry about the difference of browsers and search engine. English is not my main language and that's the reason that I made that mistake

Anyways, At some of my friends computers that start page search engine is Google. Why it is different for me and why cant I change it?

I choosed my default browser to google and when I use the green part, I use the google browser. but when I use the yellow part that I pointed, it uses yandex. I couldnt find a solution