Windows7 play Flash video without sound?

A lot of users in the use of Windows7 Beta, found it to play YouTube, Tudou, Youku and other sites of the Flash, as well as online movies in the RMVB, WMV video without sound, the Web page of the same music can not hear. Play the video, music, Flash animation on your hard drive everything is OK and you can hear the sound. So where to set the Windows7 to solve this problem?

This problem is also common in Windows Xp/vista, which is not related to Windows 7, and is typically caused by the use of optimized software or by installing and uninstalling various decoders.

To resolve this problem, you can click the Start menu → run enter "regedit" and return to open Registry Editor, and in the left pane click HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindows NTCurrentVersionDrivers32 ", and then in the right-hand pane check for" Wavemapper "value. If not, just right-click in the right pane, create a new string value named "Wavemapper," and then double-click the value to set its numeric data to "Msacm32.drv" and restart the computer to fix the problem.

Tip: If you follow the above method set without sound, pay attention to check the system tray has no volume icon. If not, turn on sound and audio device properties, and select put the volume icon in the taskbar so that there is a sound.