mis-typo, correct status is Notebook with WDN4200 adapter just detect 2.4ghz

Do you have TL-WDN4200_V1_Utility or not?

yes and already installed

reboot your router. make sure you have clicked enable 2.4G and 5G wifi signal.
And reinstall your driver of TL-WDR4200.

i have the same problem with my adapter V1 and router wdn4300 and Windows 8.1!
all my gadgets see 5ghz signal, smartTV and smartphones, except adapter!
then i switch my router in 5ghz only, restart the computer and then my adapter sees 5ghz for 1-2 minutes, and lost the connection, don't see, hmn, why?

by the way, when i switch the adapter to 5ghz only, he see all dual band, heh, why?
does anyone have any ideas about these situations? please help

i have the same problem with my adapter V1 and router wdn4300 and Windows 8.1!
all my gadgets see 5ghz signal, smartTV and smartphones, except adapter!
then i switch my router in 5ghz only, restart the computer and then my adapter sees 5ghz for 1-2 minutes, and lost the connection, don't see, hmn, why?

by the way, when i switch the adapter to 5ghz only, he see all dual band, heh, why?
does anyone have any ideas about these situations? please help

{quote]i have the same problem with my adapter V1 [/quote}
What kind of adapter (model) do you have?

of course tl-wdn4200 ver:1.0
s/n:13cc0204176 if it's important

and more question:
when i install the adapter to usb Windows installing yours driver and i cannon update it! may be is it the reason?
so ... how can i install the right driver from tplink???

installed driver from cd box - working!
thanks for all