It seems that you are encountering issues with Windows activation after changing your motherboard and CPU. Here are some steps you can take to troubleshoot the activation problem:
- Check Internet Connection: Ensure that your new system is connected to the internet, as activation requires a connection to Microsoft's servers.
- Use Activation Troubleshooter: Since you have already tried the troubleshooter, ensure you are logged into the same Microsoft account that was used for the original activation. If you receive the error about servers not being available, it may be a temporary issue on Microsoft's end.
- Wait and Retry: Sometimes, activation servers may be temporarily unavailable. Wait for a few hours and try the activation troubleshooter again.
- Re-enter Product Key: If you have the original product key for your Windows 10 retail version, try entering it manually. You can do this by going to Settings > Update & Security > Activation > Change product key.
- Contact Microsoft Support: If the issue persists, consider reaching out to Microsoft Support for assistance. They can help verify your account and provide guidance on reactivation.
- Consider Hardware Changes: Since you changed significant hardware (motherboard and CPU), Windows may require reactivation. If the activation fails, it could be due to the hardware change being detected as a new device.
These steps should help you troubleshoot the activation issue after your hardware upgrade.