Q:

Failed to start Emulator console for 5554

I'm trying execute my application, but it occurs the following problem:
Failed to start Emulator console for 5554
I've already done:
Clean and Build Project and restart 

A:

Check:

if you have downloaded all of the emulator files from the SDK Manager for the version you're trying to use.
if you have enough RAM memory left to use for the emulator (remember that you define it)
if there's not another emulator already running.

Another way to know whats the problem is to check the LogCat, it provides very useful information about errors and all the stuff running, if you can't figure the problem reading it, try to ask a question with the error message FROM the LogCat, not only the one from the windows in your screen.

