You can grab a free copy of Windows 10 by running the Media Creation Tool on your Windows 7/8.1 PC. After performing the upgrade, you have to connect to the internet and your Windows 7 license will be converted to a digital entitlement of Windows 10.
Go to Microsoft’s Windows 10 download page from here.
Click the ‘Download Tool now’ button and Media Creation Tool will download
Open the Media Creation Tool and agree to the license.
Select the ‘Upgrade this PC now’ option and click Next.
Select ‘Keep all apps and files’ and continue.
Click on the Install button to begin the installation process of Windows. During the installation, the computer will restart numerous times. This process can take a while, so please be patient.
After Windows 10 is finished installing and you’re connected, you can verify your Windows 10 activation from Settings > Windows Update > Activation.
We don’t know when Microsoft will close this free upgrade method, but you should hurry up if you don’t want to lose your free copy of Windows 10.