When the start menu appears simply type cmd on your keyboard and press enter.
Step 2: A window similar to the one you see above should appear on your screen.
Step 1: Open up the Windows 10 start menu by pressing the Windows key on your keyboard.
You can also open this menu by clicking the windows icon in the lower left corner of your screen.
If two computers end up with the same IP address neither will be able to connect to the Internet.
There is a lot of information at the following link.
The router then hands the computer an IP address that has not already been handed out to another computer.
This is a very important because when you set your computer to a static IP address, the router doesn't know that a computer is already using that IP address.
If you want to know more about how networks work check out the information here.
Your router most likely assigns dynamic IP addresses by default.