The currently installed key, which is the generic product key used by Windows 10 depending on the edition installed. The Original product key. This can be your Windows 7 or Windows 8 retail or OEM.
There is no need to know or get a new key, but if you have issues with Digital Licensing or the Activation Troubleshooter, you can utilize an existing Windows 7 or Windows 8/8.1 product key you already own to reactivate if necessary. Or use the reset function in Windows 10.
The standard or the popular way of retrieving Windows product key is to use a third-party software such as License Crawler or use a free Windows product key recovery CD to recover the product key from unbootable PCs.

Windows 10 Pro Serial Key
Windows 10 Home Serial Key
Windows 10 Serial Key Retrieval Tool

Windows 8 Product Key Viewer is a little tool developed to recover Windows 8/8.1 product key from BIOS/UEFI as well as hard drive. In short, you can use this tool to retrieve Windows product key on a PC preinstalled with Windows 8/8.1, and also, if you have installed Windows 8/8.1 on a newly assembled computer.

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Ever since the release of Windows 8, all PC manufactures have started embedding product license key into the BIOS/EFI. That is, computers pre-installed with Windows 8, Windows 8.1, and Windows 10 don’t display product key information or Certificate of Authenticity (COA) sticker on the backup of the computer or in the battery bay.

Instead, PC manufactures have started embedding product key into the BIOS or EFI, and it can be seen by entering the BIOS/EFI of your computer.

While most users will never need to retrieve product key as the Windows image provided with the computer will automatically retrieve the product key from the BIOS or EFI during the installation. But if your have downloaded a fresh copy of Windows 8.1 or Windows 10 from Microsoft and want to install the same using the same product key, you need to take the help of third-party tools to recover the product key from the BIOS or UEFI.

About a year ago, we shared a free tool to recover Windows 8.1 product key from BIOS. This time around, we have another excellent utility to retrieve Windows product key from BIOS or EFI.

Windows 10 Product Key Tool

Windows 10 Product Key Tool is a newly released utility from the developer behind the very popular EasyBCD software. With Windows 10 Product Key Tool, one can easily recover Windows 7, Windows 8, Windows 8.1, and Windows 10 product license keys from the BIOS or EFI in a jiffy.

Windows 10 Pro Serial Key

To read Windows 7, Windows 8.1, or Windows 10 product key from the BIOS or UEFI, simply run OEM Product Key Tool on your PC. Upon running the tool, it will automatically scan your BIOS or EFI and display the product key. After recover the key, we recommend you store the product key in a safe location.

Windows 10 Home Serial Key

Windows 10 Product Key Tool is compatible with both 32-bit and 64-bit versions of Windows 7, Windows 8.1, and Windows 10. Visit the following page to download the latest version of OEM Product Key Tool.

Windows 10 Serial Key Retrieval Tool

Note that you might get “Unable to open MSDM table!” message if the product key isn’t present in your PC’s BIOS/EFI. If you’re getting this message, the product key sticker must be located somewhere on your PC. Look for it!

Windows 10 Serial Key Retrevial