Check the sticker on your PC or laptop
Check the Certificate of Authenticity label
Open Command Prompt as administrator
Run: `wmic path softwarelicensingservice get OA3xOriginalProductKey`
Open PowerShell as administrator
Run: `(Get-WmiObject -query ‘select * from SoftwareLicensingService’).OA3xOriginalProductKey`
Use Registry Editor to check stored key information
Use a trusted third-party key finder tool
Check your Microsoft account for digital license details
Check the original packaging or purchase email
Contact the device manufacturer or seller