Hello everyone, My USB headphones (Logitech H530 Headset) suddenly stopped working. They can play Windows 8 system sounds, but I cannot hear anything on Window Media Player, VLCC, YouTube, etc. I have already checked the "Playback Devices" section, my headphones are connected and installed as the default device. They are working fine on my Windows 7 desktop computer. I'm really confused. Can anybody help please! I'm using Windows 8 pro (64-bit). Thanks!