Android emulator doesn't launch on windows 8


i am on windows 8 and went through add-platform android and installed java and android studio.

now after "meteor run android"
everything seems fine, i get “app running at http://localhost:3000” (works in the browser) and “starting app on Android Emulator” but nothing happens, the window doesn’t open, it just keeps spinning.

then something happened (i don’t know what) and i get an error message “errors executing cordova commands” - see screenshot.

i am stuck - again! any help would be highly appreciated.
thank you!