This bug appeared in one of the recent updates, before there was not a problem. The situation is, when spotify is launched on windows, any change to audio devices list on windows, excluding of course device used by spotify, is causing spotify to hang forever. This happens when it play a song, or even when it just sits in the background. For example, I have a PC with 2 soundcards, default device, which spotify uses is connected to external amplifier. Second audio device most of the time is not used, it's onboard realtek hd audio codec, but when I plug anything that uses this second device - a mic, or a headphones, wtihout setting this device as default, then spotify hangs up forever (must use task manager to kill processes). This is very annoying because this pc most of the time is used for playing music, but sometimes I connect some devices to second sounccard (for example a tape recorder, or a fm tuner to make some recordings) and as I said, before that was'nt a problem, only after recent update that started happening.