If you don't have a digital license or a product key, you can purchase a Windows 10 digital license after installation finishes. Here's how: Select Go to Store. This opens the Microsoft Store app where you can purchase a Windows 10 digital license. Activate using a digital license Digital licenses are associated with your hardware and linked to your Microsoft account, so there's nothing you need to find on your PC. You're all set once your PC is connected to the internet and you log in to your Microsoft account. When you sign in with your Microsoft account and connect to the internet, you will be activated. Activate after reinstalling Windows 10 If you have a digital license for your device, you can reinstall the same edition of Windows 10 on this device without entering a product key.
He writes troubleshooting content and is the General Manager of Lifewire. Your only alternative is to buy a brand new copy of Windows, so it won't hurt to at least attempt to get an inexpensive replacement from Microsoft. Determine if your copy of Windows is a retail copy or preinstalled copy: Your copy of Windows is a retail copy if you or someone else purchased Windows as a standalone software package and then installed it on your computer.
Medium-to-high effort: Try a Windows 7 or 8 key Microsoft Price: When Microsoft first launched Windows license key buy 10 back init offered Windows 7 and Windows 8 users a truly free, no-strings upgrade to the new operating system. The promotion was only available for just one year—presumably to accelerate push up Windows 10 adoption rates—and expired in July
Don't Buy Cheap Windows License Key - OEM vs RETAIL vs Volume vs MSDN Explained in Hindi