This is the second unit I bought from Jack's shop and it has the same problem: wifi keeps disconnecting.  I have tried to update the driver (from both windows auto-updates and minisforum.com), uninstalled and reinstall the wireless-AC 3165, and I'm still having the same issue.  I'm waiting for responses from Minisforum before returning this unit :(.Updates:  I reached out to Minisforum technical support and got the BIOS update from them.  The WiFi is not dropping any more.  Five stars to technical support for being prompt and precise.  Thank you.