I have a laptop with pre installed Vista on it. i upgrade it to windows 7 ultimate. after installation i am trying use the product key of my windows 7 ultimate but it always failed. it says "error code 0xC004E003.... how to fix it? thank you....
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  1. If you weren't able to Validate, proceed as follows:

    1. Download this diagnostic tool, saving it to your desktop:

    => WinXP: Double-click on the executable to run the tool.

    => Vista & Win7: Right-click on the executable and select Run as Administrator to run the tool.

    2. After running the tool, click on the Windows tab and then click on Copy (to clipboard).

    NB: You may want to open a new Notepad file, paste the contents of your clipboard into it & save for future reference.

    3. Begin a new thread in the following Microsoft Genuine Advantage forum and paste the results from the WGA Diagnostic Data tool and/or OGA Diagnostic Data tool in a detailed post:

    4. A troubleshooting specialist will analyze the data and recommend an appropriate solution.
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