Android failed on starting adb

We encountered this problem today when we started adb while developing Android. Because I updated the latest adt to appear ADB server didn 't ACK, failed to start daemon then you want to start a program and that's when you get Please ensure that is correctly at 'E :\ android-ES23en-ES24en \ platform-ES26en \adb can be executed."

Step 1: Check the task manager to see if all adb.exe programs have been turned off. If not, they are all closed. Then add android-ES38en-ES39en \ ES40en-ES41en and ES42en-ES43en-ES44en \tools to the environment variable and test whether it can start under 1. If not, run the following command line:

adb kill-server 

adb start-server

That's when it might happen

E:\android-sdk-windows\platform-tools>adb kill-server

E:\android-sdk-windows\platform-tools>adb start-server

* daemon not running. starting it now on port 5037 *

ADB server didn't ACK

* failed to start daemon *

If it still doesn't work then the only option is to go to the android manager in eclipse avd device and pick the first option. Virtual device virtural device take one of the simulators and boot it up, turn off your eclipse when you boot it up, and restart it. Wish you success!!