Friends, I ask you to help. Level - nard.
Bought a Wi-Fi adapter Archer T2U Plus. Everything seems fine, the router distributes 5G quietly, speedtest gives figures from 100-250. But! In games, for example, but even the Internet surfing is such that the speed drops sharply to 0. What do you think, what is it? Like the wood set up perfectly, technical support tp-link can not help in any way, saying that "we need to reset".
Then there may be those who will help?