In this video, I go through the entire process, step by step, that allows you to upgrade your operating system from Windows 8 to Windows 10 by yourself, for free! There is not product key required!
Here is the link to the Windows 10 Download: https://www.microsoft.com/software-download/windows10
INSTALLATION FAILED: I’m seeing a lot of comments about failed installations. Someone recently discovered a solution: download the install files to a flash drive instead of the hard drive and boot from there during the process. Just make sure you flash drive is empty (you will lose anything already on there) and has more than 10GB of space (try a 16GB, 32GB, or 64GB flash drive).
NOTE: whatever architecture you currently have, whether it be 32 bit or 64 bit, will remain after you upgrade. If you are looking to switch from 32 bit to 64 bit, this is not how that is done.
PRODUCT KEY: Originally, Windows would use your existing product key and register your new version of Windows once you log on and connect to the internet. You did not need to obtain your existing key or purchase a new one. That still seems to work for some people, but others are required to put in a product key before they’re allowed to continue. Please read the pinned comment in the comment section below for more details if that is your situation.
Please like, comment, and subscribe!
source