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 Gaming to solve the problem; I purchased Windows 11 from a shop where i got my PC built. My Windows 11 was activated but the problem started happening when i switched to Windows 10... Discussion in 'Windows 10 Gaming' started by Tarun Chauhan1, May 17, 2025 at 9:47 AM.

  1. TARUN CHAUHAN1
    Tarun Chauhan1 Win User

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


    I purchased Windows 11 from a shop where i got my PC built. My Windows 11 was activated but the problem started happening when i switched to Windows 10 then after few months got it auto updated to Windows 11 Pro.I switched to Windows 10 due to some issues i was facing in Windows 11 but later when i figured out how i can get it fixed i switched back to Windows 11 from the internal option to update windows.I am not sure why but it auto updated my windows to Windows 11 Pro and after few months i started getting Activate Windows watermark on the bottom corner of my screen.I thought it was due to m

    :)
     
    Tarun Chauhan1, May 17, 2025 at 9:47 AM
    #1
Thema:

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

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