need to reactivate windows

shawn latner 0 Reputation points
2026-11-11T12:08:52.19+00:00

i flashed bios, now i need to reactivate windows i need help please

Windows for home | Windows 11 | Licensing and activation
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  1. DaveM121 947.5K Reputation points Independent Advisor
    2026-11-11T12:41:38.0033333+00:00

    Hi Shawn,

    A BIOS update may change the Hardware Id. of the processor or motherboard, and that causes the activation servers to think you have changed your PC.

    1

    Where did you get your Windows licence was that pre-installed on the PC or did you purchase a full retail Windows licence from Microsoft or from a 3rd party retailer, and if so, do you have the product key?

    Or is your Windows licence based on a free upgrade from a previous Windows 7 or 8 licence?

    2

    Click your Start Button, type cmd then right click Command Prompt and choose 'Run as Administrator'

    Run or paste this command and hit Enter:

    slmgr.vbs /dlv

    Please post a screenshot of the resulting dialog

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  2. AI answer

    2026-11-11T12:09:26.8166667+00:00

    Run the Windows 11 Activation troubleshooter and select I changed hardware on this device recently, because a BIOS update can cause Windows activation to treat the device as changed.^1^

    Reactivate a digital license

    1. Connect the PC to the internet.
    2. Sign in to Windows using the same Microsoft account previously associated with its Windows digital license.
    3. Open Start → Settings → System → Activation.
    4. Select Troubleshoot.
    5. Select I changed hardware on this device recently → Next.
    6. Sign in to the connected Microsoft account if prompted.
    7. Find the PC in the device list, select This is the device I’m using right now, and then select Activate.^2^

    Also check the edition shown under Settings → System → Activation. The installed edition—Windows 11 Home or Pro—must match the edition covered by the original license.^2^

    If you have a product key

    Open Settings → System → Activation → Change product key, enter the 25-character key, and complete activation.^3^

    The key may be:

    • Preinstalled on the PC or supplied with its packaging or Certificate of Authenticity.
    • In the retailer’s confirmation email or online account.
    • In the Microsoft purchase confirmation email or Microsoft account order history.
    • Unnecessary if Windows came from a free upgrade, which normally uses a digital license instead.^4^

    If activation still fails

    • If the PC does not appear in the troubleshooter, verify that Windows is signed in with the same Microsoft account that held the license.
    • If Windows was preinstalled and no key is available, contact the PC manufacturer for the original OEM licensing information.
    • Record the activation error displayed under Settings → System → Activation, then contact Microsoft customer support for license verification if neither the digital-license nor product-key route succeeds.^2^

    Do not purchase another license until the existing digital license or product key has been checked.

    References

    1. How to reactivate windows 11 after BIOS update. - Microsoft Q&A
    2. [Windows 11](https://support.microsoft.com/windows/activation/reactivating-windows-after-a-hardware-change#link-your-windows-11-digital-license-to-your-microsoft-account)
    3. [Windows 11](https://support.microsoft.com/windows/activation/activate-windows#reactivating-windows-11-after-a-hardware-change)
    4. Find your Windows product key
    AI-generated content may be incorrect. Read our transparency notes for more information.

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