you can login to the web interface 192.168.0.1 to check the firmware and update to that latest firmware

Nope

The default login username and password are both admin http://www.tp-link.com/en/faq-1581.html

what's the original email ? Have you received any activate email when you register it? As far as I know, if cannot received activate email, should the the firewall or something of the email.

Is the 5G LED on? After the firmware update, you can press the reset button for 10 seconds and reconfigure the router

http://forum.tp-link.com/showthread.php?101094-Security-Flaws-Severe-flaws-called-quot-KRACK-quot-are-discovered-in-the-WPA2-protocol # Physical proximity: An attack can only happen when an attacker...