Windows 10: Windows Activation error "Product key was already used on another device"

Discus and support Windows Activation error "Product key was already used on another device" in Windows 10 Software and Apps to solve the problem; I’m facing an issue with Windows activation and would appreciate your help.I purchased a genuine copy of Windows 11 when I got my PC built from a local... Discussion in 'Windows 10 Software and Apps' started by Tarun Chauhan1, May 17, 2025 at 9:52 AM.

  1. TARUN CHAUHAN1
    Tarun Chauhan1 Win User

    Windows Activation error "Product key was already used on another device"


    I’m facing an issue with Windows activation and would appreciate your help.I purchased a genuine copy of Windows 11 when I got my PC built from a local shop. Initially, everything worked fine and Windows 11 was properly activated.However, I later switched to Windows 10 due to some issues I was experiencing with Windows 11 at the time. Once I figured out the fix for the issue I was facing earlier, I used the built-in update option to return to Windows 11. My system automatically updated to Windows 11 Pro—I did not manually choose the Pro version. This upgrade happened through the normal Windows

    :)
     
    Tarun Chauhan1, May 17, 2025 at 9:52 AM
    #1
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Windows Activation error "Product key was already used on another device"

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