Hi Francis Hirst,
Thank you for providing the detailed troubleshooting history. Since the issue occurs across Wi‑Fi, Ethernet, and mobile hotspot connections, and even persisted after reinstalling Windows, the underlying cause may be related to how Windows validates connectivity to Microsoft services rather than the network connection itself.
One area that may be worth checking is whether Windows can reach Microsoft's connectivity test endpoints:
- Open Command Prompt as Administrator.
- Run:
nslookup www.msftconnecttest.com - Then open:
https://www.msftconnecttest.com/connecttest.txtin a browser and confirm the page loads successfully.
You can also review the Event Viewer for networking or authentication-related errors:
- Press Win + R, type
eventvwr.mscand press Enter. - Navigate to: Windows Logs > System > Applications and Services Logs > Microsoft > Windows
- Look for warnings or errors occurring when Microsoft 365 or Minecraft sign-in attempts fail.
If available, please share any specific error codes from Microsoft 365, the Minecraft Launcher, or relevant Event Viewer entries. Those details may help narrow down whether the issue is related to network connectivity detection, authentication, or a Windows component involved in Microsoft sign-in services.
I know you've already invested considerable time trying to resolve this. Hopefully, the additional diagnostic information can help identify what is preventing these Microsoft services from recognizing the connection correctly.