Check the product key sticker on your PC, laptop, or packaging
Look in the confirmation email if you bought Windows 10 online
Check your Microsoft account order history for a digital license
Open Command Prompt as administrator
Run: `wmic path softwarelicensingservice get OA3xOriginalProductKey`
Open PowerShell as administrator
Run: `(Get-WmiObject -query ‘select * from SoftwareLicensingService’).OA3xOriginalProductKey`
Use a third-party key finder tool if the key is stored in firmware
Check the BIOS or UEFI for an embedded OEM key
Contact the seller or manufacturer if you cannot find it
Use the Windows activation troubleshooter if you only need to reactivate Windows