“waiting for target device to come online” in Android Studio 2.3

Question

Recently upgraded to Android Studio from 2.2.3 to 2., running on Win10

Emulator stopped working since then. Tried installing other images(25 rev 4)/upgrading for AVD

Answer 1

I had another Android emulator running in the background, completely separate from Android Studio. I saw it in the list when I loaded ADB, so it was detected for some reason, but I ignored it. Anyway, when I closed it, this error went away and I was able to load my app no problem. Specifically, I had BlueStacks loaded. So, if you use BlueStacks or another Android emulator, close that as that might be the problem.