Hi all im having a really frustrating problem with my laptop so here goes.For some reason the sound on my laptop dissapears after 15mins of being turned on this has only just started happening never had a problem with it before,but when i plug my headphones in all is fine and the sound never goes off at all.I have tried uninstalling driver reinstalling drivers ive run virus checks and all that kind of stuff,ive also got into the sound properties and made sure the sound i want is enabled ive even done a full reinstall of windows 7 and still im facing this problem.When the sound does cut off i still see the volume bar jumping up and down like theres sound playing but im hearing nothing until i plug my headset in or until i reboot the laptop and again it will go off after 15 mins.So ive tried all i know and im hoping somebody here can help me in this matter as its driving me mad.My laptop is a MSI MS-16y1 Windows 7 thanks in advance.