You may have upgraded your Windows 7 or Windows 8 to the latest Windows operating system: the Windows 10, and might be wondering what is your Windows product key / license key right now.
I have received a few reports from users that they are not able to use Windows 7 or Windows 8 license to active the clean Windows 10 installation, even after upgraded. So, in case you want to reinstall your Windows 10 operating system (OS), which product key you will use?
Also read: How to setup Windows Hello?
When you upgrade to Windows 10, the system will automatically verify your old product key and if it’s valid, the system will assign a new product key for your Windows 10 OS. You have to find your new product key before do a fresh Windows 10 installation or reinstall..
In order to retrieve your Windows license key, you have to download a tool called ProduKey (visit here to download). This software will automatically find product key / license key / activation code for over 1000 different apps.
Have you read: How to install Windows 10 on your computer ?
The ProduKey app will show you activation codes for many apps on your computer, as well as the product key of Windows 10 OS. You can select Windows 10 product key, right click and save it as a .txt file to your computer or write it down. In the next time you are installing Windows 10, enter this Windows 10 product key and it will be authenticated.