Not to mention that different conditions apply for non-OEM retail keys, as well as those given to people who upgraded to Windows 10 for free. There may be other scenarios where you may still want to manually find a Windows key stored in your UEFI/BIOS, or prevent this key from automatically being applied during installation. We will explain that in better detail in a minute.

So, if you have a newer Windows PC or you already log in using your Microsoft account, you generally shouldn't have to search for your original Windows 10 key. This means your Windows 10 license now ties Windows keys to Microsoft accounts, letting you activate a copy of the operating system simply by logging in with valid online credentials. But because your hardware can significantly change if you upgrade your hardware, this entitlement was expanded to become a 'Digital License' when 2016's Anniversary Update (1607) arrived. Windows 10 introduced a 'Digital Entitlement' element to Microsoft's license which links your Windows key to an ID generated based on your PC's hardware. We'll cover all you need to know in this article, from old school ways to retrieve keys, to the more modern approaches to make good use of your licenses and what restrictions may apply depending on your type of license. Microsoft has been changing and improving the way it handles Windows licenses.

In other instances, for example if you built and installed your OS, your key is associated with your Microsoft account, so there is no way to 'lose it' anymore.

But in recent years manufacturers started storing this license within the machine's UEFI/BIOS and the information is automatically retrieved and applied when reinstalling the operating system. In brief For the longest time Windows PCs came with a product key sticker that was placed outside of the machine or with your computer's manuals.

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