Thanks for the reply.   I hadn't tried disabling Band Steering as I'd previously set up multiple SSID's on different frequencies and that hadn't helped.   I tried it to confirm, unfortunately no effect.   Just in case...I hard reset the router again. No change.   Multiple devices have connected without difficulty in the 6 weeks I've had the router. The problem PC did connect, once. It's my work laptop. It has sucessfully connected to dozens of wifi networks over time. The laptop wifi card doesn't support random MAC adressing, so that's out.   OK. I solved it. I found a post on an Intel board which suggested some of their ac cards could have difficulty seeing WiFi 6/ax devices, preventing connection to the supported, older standard. Their driver packs failed, as did the Network Driver advisor. Over to Lenovo, where i found a 2019 driver for my card, but not my laptop model.  Download over the hotspot, install, reboot and we are up and running. WiFi card now sees 2.4Ghz and 5Ghz, connects to both.   Cheers ... View more