TL-WR1045ND is for RU market only. Its hardware is the same as TL-WR1043ND V3. :)

Sound interesting... If it happens again, after login connecting to 2.4GHz Wi-Fi, check the Wi-Fi password on Wireless 5GHz---Wireless Security page. If it is right indeed, try to change SSID for...

You disabled hardware nat on web interface of C7?

Any problem with your internet connection? Desribe in details?

No idea. Try to putting username and password on web interface of W8960N.

Operating system of your laptop? When you try to connect Wi-Fi, does it require for Wi-Fi password? If it fails to connect, what's the error message? Try to disable Wi-Fi security and change SSID on...