http://forum.tp-link.com/showthread.php?80047-How-to-configure-proxy&p=157435&viewfull=1#post157435

It is true that the we cannot configure a proxy on this router.

What's the firmware version of your C7? If it is not 140704, upgrade it first. http://www.tp-link.com.my/support/download/?model=Archer+C7&version=V2#tbl_j If the problem is not fixed, you'd better...

Chris, did you read the user guide? http://www.tp-link.com/resources/document/TL-SG3424P_V2_UG.pdf

Why not buy a third powerline adapter to work with the kit and place it in the TV room? A range extender will work better in the same stairs to boost Wi-Fi signal. My suggestion is that buy a PA4010...

Normally, your PC should obtain IP address from D2 automatically. When the PC uses dynamic IP, what's the IP address obtained? How about the printer? D2 is working as a modem router or router only?