Its simple command that clear product key from Windows Registry, then no product key reliever or retriever works; that help to prevent disclosure attack like recovery of product key by anonymous user.

How To:

1. Run Command Prompt as Administrator (Elevated Command Prompt) and execute the following command:

slmgr -cpky or

slmgr /cpky

2. Wait for confirmation dialog box and restart PC to take effect. It helps genuine Windows user to secure Windows License.

Applies To:

  • Windows Server 2008 R2
  • Windows Server 2008
  • Windows 7 Ultimate
  • Windows 7 Enterprise
  • Windows 7 Professional
  • Windows 7 Home Premium
  • Windows 7 Home Basic
  • Windows Vista Ultimate
  • Windows Vista Enterprise
  • Windows Vista Business
  • Windows Vista Home Premium
  • Windows Vista Home Basic

3 responses to “Clear product key from Windows Registry to prevent disclosure attacks”

  1. Clarks Avatar

    Mines doesnt work, it says slmgr is not recognised as an external or internal command, operable program or batch file. HELP

    1. Edowado Birdie Avatar
      Edowado Birdie

      Turn back on your Software Protection…It is located in Services, open task manager if you have windows 7 go to services tab you’ll see at the far right bottom corner is another button named services hit it now find the Software Protection service start it up and also set it to (Automatic) Delayed Start. It is the safest option for that service. Hope that helps

  2. Edmond Poplin Avatar
    Edmond Poplin

    Great info here! I have been searching for this everywhere, and I’m glad I finally came across it! Keep up the great work.

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