Do you have username and password from talktalk? If not, you have to confirm it. As I know, talktalk use VLAN ID 101 and PPPoE as the connection type. But you'd better check with your ISP. If...

No worries if it shows upgrade successfully... As to the firmware display issue, you may read the post here....

It is true that extender's SSID can be different from main router's SSID, but it is not working as guest network feature you expected. As the range extender is used to extend Wi-Fi network, normally,...

What kinds of file format? SAMSUNG SMART TV supports standard DLNA protocol? Maybe it is a DLNA compatibility issue.

You tried the 8-digit password on the bottom of extender? You didn't clone Wi-Fi or change any wireless settings on web interface ot the extender? Check the password on the extender's web interface....

After pairing them, powerline lights are on on all powerline adapters? Pairing guide: http://www.tp-link.com/en/faq-258.html Wi-Fi Clone guide: http://www.tp-link.com/en/faq-567.html Change Wireless...