@benso0919 

Hi,

Have you tried the Archer TX20U Nano in other USB ports of your PC yet?

It is quite common for PCs to have more than one USB controller operating the many USB ports and occasionally one might handle a certain device better than the other. (to find out open the Device Manager and look for "[brand name] USB 3.0 eXtensible Host Controller" under "Universal Serial Bus controllers")

Also, does Archer TX20U Nano show some error message in the Device Manager?

  @woozle 
Hello,
Yes, I have tried plugging it in other USB ports. Once I plugged in, the device manager can recognize the device very quickly, however not in the window settings, and the PC will lost connection to the internet. After rebooting, the Archer TX20U Nano will be recognized as "TP Link Wireless USB Adapter" both in the device and window settings, but still can not be enabled. I have never seen some error message in the device manager but something mentionable is once I unplug the Archer TX20U Nano, it stays on the device manager unless I reboot (which will trigger the blue screen thing).

  @benso0919 

What kind of Wi-Fi adapter did you use before you got the Archer TX20U Nano? In case it also was an USB adapter, was it working fine?

When you say the Wi-Fi cannot be enabled, do you mean the "Wi-Fi" button shown in the picture below? Is the button inactive or is it active, but when clicked nothing happens?

Do you have speakers or headphones connected to the PC? If yes, is there some sound when you enable the Wi-Fi, like the sound when a USB devices is plugged in or removed?

  @woozle 

Sorry for mixing it up, I meant the Archer TX20U Nano cannot be enabled in the Network connections settings. It only shows the original one from my motherboard (which has poor performance, that's why i need the Archer TX20U Nano to work) is enabled, no matter how much time I right-click the Archer TX20U Nano and press enable, it just stays disabled.