在运行时出现了下面的问题，要怎么解决，试了很多种方法都不行，求助求助

 The connection to adb is down, and a severe error has occured.

 You must restart adb and Eclipse.

Please ensure that adb is correctly located at 'E:\安卓开发工具\adt-bundle-windows-x86-20131030\sdk\platform-tools\adb.exe' and can be executed.