Under Windows system, the adb server cannot be started automatically，Resulting in unrecognized device.

[dawenbin]

Using this tool under Windows system, if for some reason the adb server service stops unexpectedly (use adb kill-server to simulate this scenario), at this time I use the tool again, the device list cannot be recognized and displayed, and I cannot continue to download step.
However, this situation did not appear in the Linux operating system. After research, it is found that when the software displays the "Initiating the engine" process, the adb server will be started automatically.
The above is just my personal judgment. If the BUG does exist, please reply to me and fix it in time.