Windows product key is not valid

I turned on my laptop and it says that my Windows product key is not valid I got it, but it won't work

any ideas?

Hello

You don't give us much information about the OS. Is - this detail Windows? Where do you have a serial number? Looks like you enter an incorrect serial number (fake)

Tags: Toshiba

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    REFERENCE DELL M08 APIC

    FACP DELL M08

    HPET DELL M08

    STARTING DELL M08

    Original title: my windows vista Home Basic product key is not valid for activation

    MCFG DELL M08

    M08 DELL SLIC

    SSDT PmRefCpuPm

    How can I solve the problem? Thank you.

    Run the Diagnostics of Genuine tool at this link http://go.microsoft.com/fwlink/?linkid=52012.

    Hi steph_ts,

    In addition to the suggestion of Andre.Ziegler, following links and check

    1. you remember to make changes to the computer before this problem?

    You can consult the following KB articles and try the suggested methods for error: 0XC004F050

    How to troubleshoot the error codes Activation Volume Windows 7, Windows Server 2008 and on Windows Vista computers

    http://support.Microsoft.com/kb/938450

    Error message when you try to activate a copy of Windows using the Windows Activation Wizard: "the Software Licensing Service reported that the product key is not valid: 0xC004F050.

    http://support.Microsoft.com/kb/950756

    Also see the following link for more information about reduced functionality mode:

    Error message when you start Windows Vista: "your activation period has expired".

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    Hope this information is useful.

    Jeremy K
    Microsoft Answers Support Engineer
    Visit our Microsoft answers feedback Forum and let us know what you think.

    If this post can help solve your problem, please click the 'Mark as answer' or 'Useful' at the top of this message. Marking a post as answer, or relatively useful, you help others find the answer more quickly.

  • I bought a pc used with windows 7, however, the product key is not valid. I would like to get Windows 8. What would be my best course of action?

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    In my opinion your best course of action would be to buy and clean, install a license of system builders.

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    Due to problems with Windows Update, and more specifically by using the 8.1 free update, I had some problems and have re-isntalled twice now on this PC.

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    Required to reactivate by phone after the 5th reinstalled only happen based on the license.

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    Hello

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    Iain

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