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Forked from eyecatchup/get-win7-productkey.vbs
Last active November 9, 2017 01:11
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' VBS Script to get the Windows(R) 7 Product Key from a PC's registry.
'
' Save the VBScript as "getWin7Key.vbs" somewhere on your Windows7 PC.
' Now, when you double-click the local script file an alertbox pops up
' displaying the product key stored in the machine's Windows registry.
'
'http://www.howtogeek.com/124286/how-to-uninstall-your-windows-product-key-before-you-sell-your-pc/
'http://goo.gl/x3eO0x
Set WshShell = WScript.CreateObject("WScript.Shell")
KeyPath = "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\DigitalProductId"
MsgBox ExtractKey(WshShell.RegRead(KeyPath))
Function ExtractKey(KeyInput)
Const KeyOffset = 52
i = 28
CharWhitelist = "BCDFGHJKMPQRTVWXY2346789"
Do
Cur = 0
x = 14
Do
Cur = Cur * 256
Cur = KeyInput(x + KeyOffset) + Cur
KeyInput(x + KeyOffset) = (Cur \ 24) And 255
Cur = Cur Mod 24
x = x -1
Loop While x >= 0
i = i -1
KeyOutput = Mid(CharWhitelist, 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
ExtractKey = KeyOutput
End Function
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