
Option 1: Using Command Prompt (With Admin Privileges)
wmic path softwarelicensingservice get OA3xOriginalProductKey
Option 2: ShowKeyPlus From Microsoft Store
Open Microsoft Store and search for ShowKeyPlus.
https://www.microsoft.com/store/productId/9PKVZCPRX9NV

Option 3: Using Windows Registry Key
Type “regedit” without inverted commas and select “Run as administrator” under Registry Editor

Next, browse to this tree of values in the Windows Registry and you’d see it displayed as the key value of “BackupProductKeyDefault” under “SoftwareProtectionPlatform” as below;
Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\SoftwareProtectionPlatform
