ADB not responding. You can wait more, or kill “adb.exe” … windows 8

Question

When I try to test my Android application with an android emulator as always I now suddenly get an error message. I\'m working with Windows 8. So far I tried the following thing

Answer 1

I saw this on a Mac OS X.

I shut down Android Studio and ran adb get-state in the terminal. When I started Android Studio back up, the warning had gone away.

BTW, I did just try restarting Android Studio without any luck. I am sure a restart of OS would have fixed it too.