@ChSy Hello, Chris, thanks for your reply. I haven't heard the Poynting antennas you mentioned, while if you want to change the external antenna, we need change all of them. And the Archer MR600 has...

@Bman.gnote Hello, please provide the model number and its hardware/firmware version. And where did you buy this router(TL-MR6400)? Good day.

@technocrat You are welcome, glad to help you. If need more help, do not hesitate to contact us. Good day.

@BabaJi Hello, I found that there is only original firmware available on the India official website. Below is download link of the latest firmware for Archer MR400 from global official website....

@AlexFr What about other network activities? Like browsing or downloading, do you have the same issue? What is the led status of the MR6400 when the router stops working? With computer connected to...

@IanC You can give it a go when it happens again. Besides, you can verify whether there is new driver available for the Intel 82579LM adapter. Good day.