The provided VBScript code extracts and decodes the Windows product...

September 1, 2025 at 12:39 PM

Set WshShell = CreateObject("WScript.Shell") MsgBox ConvertToKey(WshShell.RegRead("HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\DigitalProductId")) Function ConvertToKey(Key) Const KeyOffset = 52 i = 28 Chars = "BCDFGHJKMPQRTVWXY2346789" Do Cur = 0 x = 14 Do Cur = Cur * 256 Cur = Key(x + KeyOffset) + Cur Key(x + KeyOffset) = (Cur \ 24) And 255 Cur = Cur Mod 24 x = x -1 Loop While x >= 0 i = i -1 KeyOutput = Mid(Chars, Cur + 1, 1) & KeyOutput If (((29 - i) Mod 6) = 0) And (i <> -1) Then i = i -1 KeyOutput = "-" & KeyOutput End If Loop While i >= 0 ConvertToKey = KeyOutput End Function

The provided VBScript code extracts and decodes the Windows product key (license key) stored within the Windows registry. Let's break it down:

Key components of the code:

  1. WshShell Object Creation:

    Set WshShell = CreateObject("WScript.Shell")
    

    This creates a WshShell object to interact with the Windows system shell (e.g., for reading registry data).

  2. Registry Access:

    WshShell.RegRead("HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\DigitalProductId")
    

    This reads the value of the DigitalProductId registry key, which stores encoded information about the Windows product key. This value is located in the HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion path.

  3. Key Decoding Function (ConvertToKey):

    • The function takes the DigitalProductId data as input, which is a binary structure containing the encoded product key.
    • The KeyOffset = 52 constant determines where the relevant product key data starts inside the DigitalProductId.
    • The decoding logic extracts the product key using base24 decoding logic (based on the Chars string).
    • The result is a 25-character alphanumeric product key, formatted with dashes every 5 characters (e.g., XXXXX-XXXXX-XXXXX-XXXXX-XXXXX).
  4. Display the Product Key:

    MsgBox ConvertToKey(WshShell.RegRead("HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\DigitalProductId"))
    

    This calls the ConvertToKey function, passing the DigitalProductId value from the registry, and displays the decoded product key in a message box.


Summary:

This script retrieves the Windows product key stored in the registry (HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\DigitalProductId), decodes it, and displays it in a message box. This is often used for recovering the Windows license key for backup or troubleshooting purposes. However, this method is specific to certain versions of Windows (e.g., it may not work for systems using digital licenses linked to Microsoft accounts).

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