1. highsenberg's Avatar
    Hi, I have a Lenovo Z500 laptop which came with Windows 8.1 Single Language License.

    Yesterday I upgraded to Windows 10 via Windows Update. But since yesterday it says "Windows not activated". When I click on the Activate Windows icon and click the error details link I get the error code: 0xC004C003.

    Does anyone know how to solve it? I know some people facing the same issue but they did a clean install, I didn't.
    08-01-2015 10:30 AM

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