Sound card broken?

Hello

So last night i was calmly watching a youtube video on my laptop when all of a sudden the audio cut off.I clicked on the audio icon on the toolbar but it didnt show up the usual percentage of audio.Instead, it automatically went to troubleshooting and came up with nothing.By checking the audio settings i realised that as if my computer had never installed any audio devices.

IMPORTANTPOINTS

1.I was using headphones at the time (Razer Kraken 7.1)
2.Not even the default speakers where recognisable
3.I dont have any reboot points so i cant do that
4.I have tried going to my computer and rebooting, seeing if the audio is startup and automatic, tried finding viruses,updating my audio software and rebooting my audio devices.

Please help me.