Изучаю Eclipse и при первой же компиляции проекта в консоли появилось следующее
[2013-12-16 08:24:14 - qwerty] Android Launch!
[2013-12-16 08:24:14 - qwerty] The connection to adb is down, and a severe error has occured.
[2013-12-16 08:24:14 - qwerty] You must restart adb and Eclipse.
[2013-12-16 08:24:14 - qwerty] Please ensure that adb is correctly located at 'C:\android\adt-bundle-windows-x86_64-20131030\sdk\platform-tools\adb.exe' and can be executed.
Поискал решения в гугле. Ни одно не подошло.