Invalid product key activation cade 0xC004C003 invalid license key already in use. RRS feed

  • Question


    It tells me that my license key is already in use and that it is invalid. after having to many problems with an upgrade installation of windows vista home basic to home premium and having to many problems I did a clean install and now it is telling me that my license key is invalid and already in use. please help
    Monday, February 18, 2008 3:38 AM


  • Hi Quantum2001,


      You are only able to Activate Vista by the Internet the first time you Activate. Any activations after the first time, must be done by Phone.


      If you are unsure how to Activate by Phone, please see the below steps:


    a) If you have access to the Start button: Click the Start button, and type in "slui.exe 4" in the search field and then press the "Enter" key. This will bring up the Activate by Phone dialog window. Follow the steps provided by the window. The phone activation process should only take about 6 minutes.

    b) If you do not have access to the Start button: Reboot and login to Vista, a dialog window will come up. In that window, click the option "Access computer with reduced functionality". Once you do that, Internet Explorer or Firefox browser will open. In the address bar type "c:\windows\system32\cmd.exe" press enter, a new window will come up, type: slui 4 and hit enterand follow steps to Activate over the Phone.

    NOTE: The key to this process is that you need to talk to a Live Activation Rep! When you first call, you will be interacting with an Automated Voice, either select the option to talk to a Live Rep or if there is no option, do not enter any numbers. This should force the automated voice to tansfer you to a Live Rep.

    Thank you,
    Darin Smith
    WGA Forum Manager

    Monday, February 18, 2008 11:14 PM