Windows 7: My laptop sound sometimes disappears

Hi all,
First of all i am new at this forum so dont be harsh on me.

I have problem with my Asus N75SF laptop.Sometimes my sound dissapears and it comes back after a while or when i restart my laptop.So the problem occurs when i turn on my laptop there is no sound and after 5 min or so it comes back or i need to restart.Is it possible to have problem with my sound driver?
I have Realtek High Definition Audio.I check the driver in device manager and try to update but it says that my driver is up to date.

Can you help me with this problem?Do you have any solutions?
Thanks in advance

Do you have any suggestion?

So guys do you have any advice to give me?
Please i am desprate!!!
Thanks

You can get drivers for your laptop here: ASUSTeK Computer Inc. - Notebooks- ASUS N75SF

Just use the drop-down list to select your operating system first, then expand Audio for your sound drivers.

It could be a heat issue causing a component to work intermittently. Often times in electronics something will work when it's cool but stop working when it warms up or will not work when it's cool but then start working when it warms up. These can be some of the hardest problems to diagnose. It's not necessarily overheating, just normal temps causing things to expand and contract. It could be caused by a poor solder joint.

If your drivers are good then it could be a hardware issue such as what I described above. If that's the case the fix is to replace the motherboard. Is the laptop still under warranty? If so, I would contact ASUS about it.

Another possible solution is to get an external USB sound device which is a PITA to use with a laptop.

Ok thanks i will keep you informed and try with the drivers first.

Ok guys i downloaded the drivers and it's seems that everything is ok for now.
Anyway thanks for the info.

Re-Installing windows will fix this issue