Option Explicit  

Dim objshell,path,DigitalID, Result  
Set objshell = CreateObject("WScript.Shell")
'Set registry key path
Path = "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\"
'Registry key value
DigitalID = objshell.RegRead(Path & "DigitalProductId")
Dim ProductName,ProductID,ProductKey,ProductData
'Get ProductName, ProductID, ProductKey
ProductName = "Product Name: " & objshell.RegRead(Path & "ProductName")
ProductID = "Product ID: " & objshell.RegRead(Path & "ProductID")
ProductKey = "Installed Key: " & ConvertToKey(DigitalID)  
ProductData = ProductName  & vbNewLine & ProductID  & vbNewLine & ProductKey
'Show messbox if save to a file  
If vbYes = MsgBox(ProductData  & vblf & vblf & "Save to a file?", vbYesNo + vbQuestion, "BackUp Windows Key Information") then
  Save ProductData  
End If



'Convert binary to chars
Function ConvertToKey(Key)
        Const KeyOffset = 52
        Dim isWin8, Maps, i, j, Current, KeyOutput, Last, keypart1, insert
        'Check if OS is Windows 8
        isWin8 = (Key(66) \ 6) And 1
        Key(66) = (Key(66) And &HF7) Or ((isWin8 And 2) * 4)
        i = 24
        Maps = "BCDFGHJKMPQRTVWXY2346789"
        Do
                  Current= 0
           j = 14
           Do
              Current = Current* 256
              Current = Key(j + KeyOffset) + Current
              Key(j + KeyOffset) = (Current \ 24)
              Current=Current Mod 24
               j = j -1
           Loop While j >= 0
           i = i -1
           KeyOutput = Mid(Maps,Current+ 1, 1) & KeyOutput
           Last = Current
        Loop While i >= 0  
        
        If (isWin8 = 1) Then
           keypart1 = Mid(KeyOutput, 2, Last)
           insert = "N"
           KeyOutput = Replace(KeyOutput, keypart1, keypart1 & insert, 2, 1, 0)
           If Last = 0 Then KeyOutput = insert & KeyOutput
        End If        
        

        ConvertToKey = Mid(KeyOutput, 1, 5) & "-" & Mid(KeyOutput, 6, 5) & "-" & Mid(KeyOutput, 11, 5) & "-" & Mid(KeyOutput, 16, 5) & "-" & Mid(KeyOutput, 21, 5)
   
        
End Function
'Save data to a file
Function Save(Data)
        Dim fso, fName, txt,objshell,UserName
        Set objshell = CreateObject("wscript.shell")
        'Get current user name  
        UserName = objshell.ExpandEnvironmentStrings("%UserName%")  
        'Create a text file on desktop  
        fName = "C:\Users\" & UserName & "\Desktop\WindowsKeyInfo.txt"
        Set fso = CreateObject("Scripting.FileSystemObject")
        Set txt = fso.CreateTextFile(fName)
        txt.Writeline Data
        txt.Close
End Function