Sound on my laptop disappeared

Since upgrading my laptop Windows 7 since Vista, I have no sound.  If I go back to an earlier date, sometimes I hear but only until an update occurs.  Then he went again.  Can anyone help?

If your computer has problems play a sound, try using the Audio playback problems resolution to solve the problem. For measures and additional information, see o ink below.

Open the troubleshooting of Audio playback

http://Windows.Microsoft.com/en-us/Windows7/open-the-playing-audio-troubleshooterOpen

http://www.Microsoft.com/Windows/compatibility/Windows-7/en-us/default.aspx?type=hardware

http://Windows.Microsoft.com/en-us/Windows7/tips-for-fixing-common-sound-problems

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For more information visit: http://windows.microsoft.com/en-us/windows7/Update-a-driver-for-hardware-that-isn ' t-work properly

Tags: Windows

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