Check the original packaging or purchase email
Look for a sticker on the device or inside the battery compartment
Open Command Prompt as administrator and run `wmic path softwarelicensingservice get OA3xOriginalProductKey`
Open PowerShell as administrator and run `(Get-WmiObject -query ‘select * from SoftwareLicensingService’).OA3xOriginalProductKey`
Use Settings > Update & Security > Activation to check activation status
Use a trusted third-party key finder tool
Check your Microsoft account for digital license information
Contact the retailer or manufacturer if Windows came preinstalled