Vaio Z12 Sound Problem - Please Help

I recently bought Vaio Z12 and experiencing sound problem very close to one that pyr0 had on last August: http://forum.notebookreview.com/sony/513809-sony-vaio-sound-quality-2.html#post6654405

pyr0:
"- The sound is cracking like the soundcard is activated and deactivated somehow
- The sound occurs only when my system is 100% silent and I click through the browser as the following sequence:
_silent____(click)_crack_"explorer folder change clicking sound"___~2.8sec___crack_silent

"The silent phase means there is absolutely no noise like I have my headphones disconnected. In the phase between the on and off cracks, there is a little bit, silent noise swoosh like you would expect to be when you have your headphones connected to a tape drive with an empty tape playing.

- The sounds appear on all volume levels.
- I have tried both the original Realtek and the Sony drivers, same behavior.
- If I have music playing (even when very low volume) and doing some browsing I don't have cracking sounds at all."

This problem occurs through headphones.
If someone had a similiar problem and solved this, your help is greatly appreciated

Thank you in advance.

 

FYI: I did not resolve the issue yet.

 

FYI: Do have the same issue. But the thing is, it is only occuring rarely (even if its idle).

 

Thank you for your info.

If I uninstall Realtek Audio Driver and use Windows 7 Default Audio Driver, the cracking sound would be gone. But if I do so, I could not use Dolby Sound Enhance and Noise Canceling options.

I am wondering if this is a common problem for Vaio Z users. This is Annoying and I hope we can fix it.