It is very important to know what is your computer serial number, it might be written already on the box it came in with, but most of us don’t keep it for long.
Whenever you are wondering, is my computer still covered under warranty? what is exactly the type and model of my computer so I can buy the right replacement or upgrade parts?
there is a very easy way to get the SN, you don’t need to be an IT Engineer / Tech to get this info,
basically, all what you need to do, is to run the following command
wmic bios get serialnumber
How to run this command?
Press windows button in your keyboard 
or type in the search box
Type CMD, click on Command Prompt
type:
wmic bios get serialnumber
You should get your computer serial number:
