Hello,
Thanks for the logfile.
Did you try with external speakers or headphones ?
We'll try to update the drivers related to sound management :
While on the Windows 8 desktop, press Win+W, type Device Manager, to search for it in Settings. Click on Device Manager to open it.
Look for "Sound controllers" and open the arborescence. Then, on each sub-item:
- right click on it,
- click on "Updat...