Windows 11 Why has my valid activation key stopped working today?

  • Thread starter Thread starter 17Crescent
  • Start date Start date
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17Crescent

My activation key has just stopped working and I now get an 'Acivate Windows' message in the bottom right corner. I have been using my activation key since I built my computer in August this year. When I bought the key I checked it with ShowKeyPlus: Edition: Win 10 RTM Professional Retail EULA: Retail I have tried to reactive it but get this message: Unable to activate Windows We can't activate Windows on this device because you don’t have a valid digital licence or product key. If you think you do have a valid licence or key, select Troubleshoot below. (0x803fa067)My computer has not changed

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