It doesn't support Windows 8

It seems like hardware issue, you can call the TP-Link support to check it. http://www.tp-link.com.au/support-contact.html#Hotline-Support

revenge wrote I just received my AC5400 last night. I immediately upgraded the firmware to V2. I already have a Cisco router providing DHCP, QoS, and other services to this and another router that I...

imsay wrote After upgrade to latest firmware 1.2.0 Build 20170630 rel.49653(5553), each time the power loss (electricity cut), the router itself reset, and required re-configuration. This is...

How do you know it reboots by itself? Did you try a hard reset?

if you connect a computer to the internet mode directly bypass the router and after modem reboot, do you need to wait for 15-20 mins to get internet access?