Win10 unknown network connection

Jul 22, 2018
1
0
10
Hi everyone.
First of all, I'm dumb in computer. Please forgive me if the problem was too simple.

Today, I've just changed my OS into Win 10 from Win 7. But there were some unknown networking connections that made me anxious.
I found them by using the command "netstat" right after installing the WIN10.
It would not happen if I installed Win 7(It would show no foreign address connecting my computer)

I think the Win10 installation is clean, because I downloaded it on official Microsoft's page yesterday.

If it was related to win10 apps, can I stop all of them from connecting my computer?
I want to do that because, even if there was a real hacker attacking my computer now, I really couldn't tell them apart.

Please suggest.