Dim $RegArray, $RegView, $Value,$Product,$Key, $rc, $Array2,$guid
  $RegView=setoption("WOW64AlternateRegView","On")
  $RegArray = SearchReg("HKLM\Software\Microsoft","DigitalProductID",2)
  if @onwow64
    $Array2 = SearchReg("HKLM\Software\WOW6432NODE\Microsoft","DigitalProductID",2)
    $RegArray=ArrayAdd($RegArray,$Array2)
  endif
  If ubound($RegArray)<0
      ? 'No matching items found'
  Else
    For Each $Value In $RegArray
      If $Value
        $Product = ReadValue(Join(Split($value,'<=>DigitalProductId'),''),'ProductName')
        If $product=""
          $guid="{" + split(split($value,"{")[1],"}")[0] + "}"
          if instr($value,"WOW6432Node")
            $product=readvalue("HKLM\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall\" + $guid,"DisplayName")
          else
            $product=readvalue("HKLM\Software\Microsoft\Windows\CurrentVersion\Uninstall\" + $guid,"DisplayName")
          endif
        endif
        If $Product
          $Key = Get_Product_Key(ReadValue(Join(Split($value,'<=>DigitalProductId'),''), 'DigitalProductID'))
            ? $Product + ': ' + $Key 
        EndIf
      EndIf
    Next
  EndIf
  $RegView=setoption("WOW64AlternateRegView",$RegView)

function Get_Product_Key($sproductid)
  Dim $aiKeyChars[24], $ilByte, $i, $iLOffset, $iUOffset, $bProductKey[15], $c, $nCur, $sCDKey
  For Each $c In Split("B C D F G H J K M P Q R T V W X Y 2 3 4 6 7 8 9")
    $aiKeyChars[$i]=Asc($c)
    $i=$i+1
  Next
  if len($sProductID)=2544
    $iLOffset=809
    $iUOffset=823
  else
    $iLOffset=53
    $iUOffset=67
  endif
  For $i = $iLOffset*2-1 To $iUOffset*2-1 Step 2
    $bProductKey[($i-($iLOffset*2-1))/2]=Execute("Exit &"+SubStr($sProductId,$i,2))
  Next
  For $ilByte = 24 To 0 Step -1
    $nCur = 0
    For $i=14 To 0 Step -1
      $nCur = $nCur * 256 ^ $bProductKey[$i] ; NOTE THE XOR! 
      $bProductKey[$i] = Int($nCur / 24)
      $nCur = $nCur Mod 24
    Next
    $sCDKey = Chr($aiKeyChars[$nCur]) + $sCDKey
    If $ilByte Mod 5 = 0 And $ilByte <> 0 $sCDKey = "-" + $sCDKey EndIf
  Next
  $Get_Product_Key=$sCDKey
EndFunction
 

Function SearchReg($Key,$Str,$SrcIn)
  Dim $Idx,$vName,$Value,$num,$SubKey,$fArr,$mbr
  $SearchReg = ''
  $num = 0
  $Idx = 0
  $vName = EnumValue($Key,$Idx)
  Do
    $mbr = ''
    If $SrcIn & 1
    $Value = ReadValue($Key,$vName)
     If InStr($Value,$Str)
       $mbr = $Key + "<=>" + IIf($vName,$vName,'<Default>')
     EndIf
    EndIf
    If ($SrcIn & 2) And InStr($vName,$Str)
      $mbr = $Key + "<=>" + $vName
    EndIf
    If $mbr
      ReDim Preserve $SearchReg[$num]
      $SearchReg[$num] = $mbr
      $num = $num + 1
    EndIf
    $Idx = $Idx + 1
    $vName = EnumValue($Key,$Idx)
  Until @Error
  $Idx = 0
  $SubKey = EnumKey($Key,$Idx)
  While $SubKey
    If ($SrcIn & 4) And InStr($SubKey,$Str)
      ReDim Preserve $SearchReg[$num]
      $SearchReg[$num] = $Key + '\' + $SubKey + "<=><KeyName>"
      $num = $num + 1
    EndIf
    $fArr = SearchReg($Key + "\" + $SubKey,$Str,$SrcIn)
    If @Error = 0
      For Each $mbr In $fArr
        ReDim Preserve $SearchReg[$num]
        $SearchReg[$num] = $mbr
        $num = $num + 1
      Next
    EndIf
    $Idx = $Idx + 1
    $SubKey = EnumKey($Key,$Idx)
  Loop
  Exit VarType($SearchReg) = 8
EndFunction
 

Function ArrayAdd($Array1, $Array2)
 ;Returns a new $Array1 
 Dim $n,$i
 $n = UBound($Array1) + 1
 REDIM PRESERVE $Array1[$n+UBound($Array2)]
 For $i = 0 to UBound($Array2)
   $Array1[$n+$i] = $Array2[$i]
 Next
 $ArrayAdd = $Array1
EndFunction