Of course we can disable WPS. You didn't see that the new firmware has fixed the issue. Upgrade the latest firmware directly if you want to protect the router.

Reset won't help? What kinds of strange IP? 169...? If you assign a static IP as 192.168.0.100 and subnet 255.255.255.0, can you login 192.168.0.1? Just connect the PC to one of LAN ports of C5...

Your model is WA850RE or WA854RE indeed? Try to download the latest firmware for the right model. http://www.tplink.com/en/download/TL-WA850RE_V1.html#Firmware After download it, unzip it and try to...

This hotspot is open (no wep/wpa) but redirects you to a login page , where they validate you are a customer. I'm afraid that MR3220 doesn't support such kinds of authentication in WDS mode.

You cannot change IP address of your NVR/Cameras to 192.168.0.* range? IP address obtained in 3G/4G section depends on your ISP. Maybe they can update on their side.

Do you know PA4010's LAN port is not gigabit port? It is impossible to get 240Mbps. Obviously, now you need powerline devices with gigabit port instead of 10/100Mbps port....