TL-WPA4010KIT? To connect the laptop directly to hub5, what's the speed? How did you test the speed? If the direct speed is slow, you should contact your ISP instead. Install the utility for PA4010...

Download the new version (140613 one) of the printer controller utility here and install it. It should work. It shows for TL-WR1043ND but it will work for TD-W8980 as well. No worries. :)...

They can work together but you have to upgrade the beta firmware regarding the chromecast issue. Ask for the beta firmware here. :) http://ticket.tp-link.com/index.php?/Tickets/Submit

Hi Peter, PA210 and WPA271 are not paired, right? How about status of powerline light on them? If powerline light is not on, follow this guide to pair them. http://www.tp-link.com/en/faq-258.html

What's the operating system of your PC? Download the driver here and try to install it manually. http://www.tp-link.com/en/download/TL-WN751ND_V2.html#Utility Take Windows 7 as an example....

T2U cannot be installed on Linux. They are incompatible with each other.