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  1. Using the Windows Activation troubleshooter - Microsoft Support

  2. Get help with Windows activation errors - Microsoft Support

  3. Activate Windows - Microsoft Support

  4. Reactivating Windows after a hardware change - Microsoft Support

  5. Running troubleshooters in Get Help - Microsoft Support

  6. Fix sound or audio problems in Windows - Microsoft Support

  7. Product activation for Windows – online & support telephone …

  8. Microsoft 365 troubleshooters - Microsoft Support

  9. Unlicensed Product and activation errors in Office

  10. Fix Windows 10 activation error 0x803F7001 - Microsoft Support