Region : UnitedKingdom

Model : TL-WN781ND

Hardware Version : V2

Firmware Version :

ISP :

bought it 2 years ago and had problems all the time... sometimes it worked for few months but it never lasted...
the adapter disconnects, uninstalls, won't see the ssid of my wireless etc...

I don't know what to do to make it working properly...

I tried
- upgrading drivers from TP-LINK/3rd part sites;
- reinstalling the adapter;
- setting up the router almost 20 times;
- tried every single router's channel with every setting combination;
- downgrading from windows 8.1 to 8;

other devices work good and have speed connection but won't be able to see the ssid when I turn on the compuer (that doesn't happen when I uninstall or unplug the adapter).

please help me!