Give us screen shot from your WAN configuration and also bar - Status router when you can use the internet

http://www.tp-link.com/en/article/?faqid=138 - but WAN port as PPPoE where you have to enter login and password and Static IP

Very important is signal level and interference from other SSID. You can check it by the application - inSSIDer.

how do i setup up an adsl connection with no adsl port? You have to buy ADSL modem for example - TD-8840T

Sorry I can't see configuration because resolution is too small.

I have installed 140402 on my router Archer C7 and running. Wireless access at 2.4 GHz is correct, access to the hard drive connected to the USB port also no problem. The print server also works...