ADB is not starting (no error message)

Question

I am trying to run adb. When I run : \"adb start-server\" it hangs during a while, and then no message.

After that the command \"adb get-state\" receive the answer \

Answer 1

1. Uninstall Platform Tools in Android SDK Manager
2. Find and delete all copies of AdbWinUsbApi.dll, AdbWinApi.dll and adb.exe
3. Reinstall Platform Tools in Android SDK Manager