Hello,

Thanks for the informations,

Please can i know how to know it myself ?

@Aram1 

All the review specifications indicated W7 64Bit,

Now there was one that had, it could have come with Linux Ubuntu 10.

But if you want to be sure you can look up the "Service Tag"

https://www.dell.com/support/home/us/en/04/product-support/product/inspiron-14-intel-n4050/overview

It will have what came installed from the factory.

Regards,

U2

Thank you so much