Are you kidding?why the title of post is TL-WN722N and in the content is TL-WDN4800? I don't thins a soho adapter can meet your requirements, maybe you need high gain antenna.

If you want to try ,please download driver at here http://www.tplink.com/en/support/download/?model=TL-WN725N&version=V1#tbl_a and just install it

I think you should buy TL-WN725N_v2 . please look here, http://www.tp-link.com/common/Promo/en/win8compatibility/ V1 maybe cannot use on win8 and 8.1. If you need to use it please use the third-party...

I'm soory to tell you, TP-LINK don,t provide driver of TL-WN751ND for windows 8.1. Because the chip solution of TL-WN751ND don't support it.

does ISP provide your ppoev6? and i have known tp-link doesn't support running ipv4 and ipv6 in same pppoe session. when is says connecting,do you get IPv6 address on configure page?

V3 the difference are hard ware and improvement