@DougWeller Here's the tpPLC utility download page - I can see at least six Windows OS versions there. You should check what version you have installed and if there's a newer.

@splashscuba I would contact the ISP and ask them to check the connection from their side.

@LindaTee Nano stations receive their IP addresses according to the main router in your environment (old ISP modem or new Archer AX73). If they use different IP subnets or any router specific...

@DanielDT Set RE DHCP server to "Deshabilitar". Restart the main router, then restart the WA850RE. For improving your WA850RE performance you may read through this thread.

@DougWeller Have you tried first to uninstall the old version and then install the new one ?

@DOGGAVELI Follow this thread.