Have you ever in the condition when you run Kingo Root for PC but it displays the loading screen for a short moment, and then tells you what is specified in the title, and lastly asks you whether you will retry or quit? If the answer to the question is yes, you must be so confused and do not know what to do. All you know that you need Kingo Root to root your device and it will be the end.
For those who are facing this kind of situation, it looks like the program thinks you are not connected to the Internet. The best way out while facing this case is to check out the Internet connection and try to fix the issue. In the some similar cases, some people use the things like Nord or any other VPN on the computer. If it is the case, then something probably is interfering with DNS. To fix the issue, you can try to set the PC to use Google DNS and then try to run it again. The third way that you can try is to check that you enabled in or out access in the Windows Firewall ad Kingo Root programs are always known as the virus to the security measures.
There are some things that you need to check first. Some of them are the USB Debugging mode enable on your device, the device connected to your computer via USB (it is better for you to use the OEM USB cable and USB 2.0 port), and the device driver properly configured.
There are also some troubleshooting options. The first one is to change another USB cable (the OEM one is preferable). The second one is to try the alternate USB port (the USB 2.0 port which is usually located behind your computer). The third one is to try unchecking “Media device (MTP)” in the USB Connection Settings. Just click it to uncheck the MTP if there is the USB icon in the notification center. Another way is to go to Settings > Storage > Menu item upper right > USB computer connection > Unckeck MTP. The fourth one is to disable any system modification related to the USB port such as applying the fast USB charge hack. The last one is to just try again.
If you still get the notification saying “Device not connected” even after installed the driver correctly, then you can try this ultimate solution. To do this, the first thing you have to do is to open the Task Manager by right clicking the taskbar and then clicking “Start Task Manager”. You can also do it by pressing Ctrl+Shift+Esc. Then, find edb.exe and right click it. The next thing you have to do is to select “End process tree”. After that, close Kingo Android Root and then re-launch it. If any case, no one of them works, you can try the Kingo Root from your phone instead of the computer. Apparently it works well on ZTE.