Even Flash video clips hosted on YouTube, Google Video, Dailymotion, CNet Video, MetaCafe, and etc will not output the sound, even though video playback fine without problem. Users cannot hear sound from mouse start navigation clicks, Windows startup sound, messenger’s user online or incoming message notification alert and etc. When the Windows no sound problem occurs, the symptoms include users do not hear any Windows system sound even though the volume control on speakers have turned on, and all audio mixers and EQs is not muted.
Windows system does not gives you sound and audio suddenly or despite sound card or audio device is present and working previously? Windows XP, 2000, NT, 2003, Windows Vista, Windows 7, Windows 8, Windows 8.1 or even Windows 10 computers may lost Windows audio and system sounds output due to the mess on file system or registry that created or left by third party utilities after installation and uninstallation, or corrupted and missing codecs, a component necessary to decompress and decode media files so that can be playback by Windows system.