@Bignose21 To access the web UI to configure the router, the local management is enabled by default, that is why you can access it with the local PC. And the Archer VR600v supports NAT loopback,...

@Klaus123 I see, thanks for your reply. You can use the previous extender to broadcast a new wifi network with new password. If need more help, just let us know.

@maestrosg Definitely sure. You can keep in touch with our engineer.

@Ismail_Hossain For 2.4GHz, channel 1, 6 and 11 are recommended, you can try them first; for the channel width, you can use 20MHz. May it help.

@Neel Hi Neel, it seems that the local official website has not uploaded the latest firmware. You can click https://www.tp-link.com/en/support/download/archer-c6/#Firmware to get the right one. May...

@Fabioturf As far as I know, there is no option to check the CPU usage of the TL-WR840N. To verify the number of hosts connected to the wifi, you can login to the web UI and go to DHCP-DHCP client...