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How to Remove Windows 10 Product Key from Registry

When Windows 10 installed on your computer, it stored its product key in the registry. But this could leave it vulnerable to being stolen from disclosure attacks by malicious software. Remove the product key from the registry will prevent your product key from being stolen. Before you do this action, it's imperative to back up your product key in a secure location, in case you forgot or lost it. This article will show you how to do.

How to Find Product Key using Notepad in Windows 10

To view the Windows Product Key, you can use a Visual Basic (VB) script that retrieves the key from the registry. The following steps will show you how to create such a script.

Step 1: Create a new Text Document on your computer.

Right-click on the blank area in Desktop or File Explorer, select New > Text Document.

Create a new Text Document

Step 2: Then copy and paste in the following bit of code into a Notepad.

Set WshShell = CreateObject("WScript.Shell")
MsgBox ConvertToKey(WshShell.RegRead("HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\DigitalProductId"))

Function ConvertToKey(Key)
Const KeyOffset = 52
i = 28
Cur = 0
x = 14
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

Show Windows Product Key

Step 3: Now save the file using the extension .vbs (instead of .txt).

Step 4: To run the script, double-click on the .vbs file. You’ll see a popup window with your product key. Hit CTRL + C if you’d like to copy the key.

View Windows Product Key

How to Remove Windows 10 Product Key from Registry

To remove the product key from the registry to prevent it from being stolen. Here's how:

Step 1: Open Command Prompt as administrator.

To do: Press Win+X, A in the keyboard. Command Prompt (Admin) window will pop up.

Command Prompt Admin

Step 2: In command prompt window, input the removing product key: slmgr /cpky command, and then press Enter.

Remove Windows Product Key via cmd

Step 3: When it prompts that Product key has been cleared successfully. Click on OK.

Remove Windows 10 product key

Step 4: Even if the product key is cleared, you can still view the partial product key.

To do: Execute command:slmgr /dli

View partial product key

Look how it displays the partial product key, this information is enough to identify which product key was used for this installation. If you lost the product key, you can recover the product key easily via the Product Key Finder.