Open Command Prompt as Administrator
Type: `wmic path softwarelicensingservice get OA3xOriginalProductKey`
Press Enter
Check the displayed product key
Open PowerShell as Administrator
Type: `(Get-WmiObject -query ‘select * from SoftwareLicensingService’).OA3xOriginalProductKey`
Press Enter
Check the displayed product key
Open Registry Editor
Go to: `HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindows NTCurrentVersionSoftwareProtectionPlatform`
Look for `BackupProductKeyDefault`
Use a third-party key finder tool if needed
Check the product key sticker or packaging if you bought a retail copy
Check your Microsoft account for digital license details