Windows 7 no sound after you have unlocked the PC

I have Windows 7 Professional SP 1, running on a ThinkPad: Lenovo's laptop.  No matter when I manually lock the PC (with Windows + L) or the screen saver times out and locks the PC, after you have unlocked the PC no sounds work, at all.  I checked device - nothing wrong with that Manager.  I checked my drivers - all to date.  There is no update in Windows Update.  I ran the audio troubleshooting integrated: he can't find anything wrong.  In the Volume mixer, I see even the green bar pulses up and down with the intensity of sound is supposed to be played - except that I can't hear anything no matter what.  I tried inhibition and reactivate the speaker control.  The only thing that 'fixed' it is logging and back, which of course is a pain.  Can anyone think how this can be fixed?  Thank you.

Hello

For me, it looks like a driver problem.

I know that you have checked for drivers on windows update and they are up to date. However I suggest to uninstall the audio drivers from the Manager of devices and then re - install on the manufacturer's Web site and see if that helps.

Let us try the following steps:

(a) click Start, type Device Manager and hit enter.

(b) expand sound, video and game controllers.

(c) make a right click on the audio adapter Conexant and click on uninstall.

(d) computer.

(e) log on to the site of the manufacturer (Conexant) audio adapter, download and install the latest drivers and install them.

Please let us know if you need more help with this, or everything related to Microsoft Windows.

Tags: Windows

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