@Markus99 Hello, thanks for your valued reply, glad to hear that you figured it out finally. If need more help in the futured, be free to let us know. Good day.

@conty40 Hello, what is the led status of the RE200 when it lost connection? At that time, with your computer connected to it, please verify the IP address and gateway it obtained. Here is the...

@UnPixel That would be great. Thanks for your updates. Best regards.

@coolspot18 Hello, have you ever tried to swap the location of the Deco units? With a slave Deco became new Main Deco, does the wifi function work properly? If the new main Deco's wifi works well,...

@Daveyh444 Hello, have you ever tried to reinstall the driver from the official website? https://www.tp-link.com/support/download/archer-t4u/#Driver You can change another USB port to give it a go as...

@Meffecter Hello, have you ever tried the troubleshooting methods mentioned on my last reply? Any updates? Besides, may I know when and where did you buy this network adapter? Good day.