You should go to NAT---Virual Servers to configure it. Inbound port and Private port on your old router are called external port and internal port on W8968 V3... By the way, did you enable remote...

What's the operating system of your PC? Is there any other wireless client which encouters the same problem? Try the RTL8192CU driver....

It is their fault...Why they refuse such a request? Can you return it and buy other resellers?

@abraham Download the firmware (Archer C2_V1_141119) from the link as below and upgrade it. It is for Unifi users. :) http://www.tp-link.com.my/support/download/?model=Archer+C2&version=V1#tbl_j

Any problems with your internet connection? If no problems at all, just ignore those messages in the log...

I'm confused about what you said and I don't know what does it mean...Are you trying to install the driver on a computer or something else? Normally, we have to install the driver as the administer.