Finaly here we have the solving problem solution:
You must uninstall your current audio driver and replace with the newest driver. Beware who the manufacture is.
In my case i have the Conexant audio HD driver.
Do not forget to uninstall the Dolby software too.
In my case i have Dolby Advanced Audio V2.
then go to :
Conexant Audio Software for Windows 8.1 (64-bit), 8 (64-bit) - Notebook , that´s the Conexant,
and :
http://support.lenovo.com/en_US/downloads/detail.page?DocID=DS032125 , that´s the Dolby soft.
Download them.
In simple step´s:
1. Uninstall the audio driver ( in device manager search for audio driver - look after the speaker icon )
DO NOT Uninstall the the speaker driver - it is difference, because ( in my case I have ) there are 2 driver´s
making the basic audio work. First is the audio driver for software solution, and speaker driver for speaker solution
Maybe some PC´s have one or two drivers for the audio. btw.
2. Restart
3. Uninstall the Dolby Adv....
4. Restart
5. Install the new Conexant audio driver from web above
6. Restart
7. Install the Dolby Adv.... driver from web above
8. Restart
9. Enjoy
For those who are live sensitive from detail´s : the joke
Windows 8 has writen that the version of Conexant has no need to upgrade the driver ( 8.54.44.52 ) on the support site is version 8.54.48.0 ( hint )
:thumb: