SOLVED for anyone else who comes across this: Turned off Windows Defender Firewall. Tried wifi connection - no internet Turned on Windows Defender Firewall. Tried wifi connection - internet! It's...

I have 3 TP-Link routers in my house, one is modem connected to NBN, other two are configured as wireless Access Points. The VR300 used to be the modem but it only has 100Mbps ports so I swapped it...