You guys have the same model? When the wired devices disappear, they lose connection to the router? Sometimes it happens on my router, but all devices work fine. I think it may be a display error.

did you upload a .bin file? check the format.

No problem with C7 working as access point? I think it could be the WDS settings on the C7. Not that setting is wrong, since you can access some websites, and I guess the WDS status is "run". Do you...

When it stays at 100%, do you notice anything unusual? like the router becomes very slow to respond? It could be a display error if the router still works properly. What you can try: disable media...

I got this beta from tplink, for C1200, EU V1 http://support.tp-link.com/f/a65fe63a04/?dl=1

Did you try go to the management menu on your PC that has internet? Is your PC connected to the tplink router directly or the modem? Some may think they can get internet on PC when going straight to...