Please ensure that adb is correctly located at 问题解决方法

今天导入个android项目，运行的时候，居然发现了个错误……

出现：
ADB server didn't ACK, failed to start daemon
Please ensure that adb is correctly located at 'D:\android-sdk-windows\platform-tools\adb.exe' and can be executed.

一开始按照网上查到的方法，关闭eclipse、关闭ADK，然后再重启电脑啥啥的，都没有用。查了下进程，adb.exe这个进程怎么都杀不掉，最后还是在运行中输入“adb kill-server”杀掉了。