Laptop OS Serial Key

[phrases]

Hey guys,

I'm a Sony VAIO User. It came to me with a preinstalled Windows 8. I was given no CD or any other stuff, just the laptop.

Like a month ago, my harddisk crashed, and needed to replace it; and temporarily a pc service installed Windows 10. But as u know, it's not compatible with a lot of things. Now i want to install Windows 8 and update to 8.1.. etc.

My question is: How can i learn my serial key for OS? (Windows 8)

Thanks in advance.

 

[ffg7]

should be a label on the bottom side if the laptop that has the serial key.