Alienware m17x r4 audio randomly gone.

[Anomaly123]

just a few hours ago i put me laptop to sleep and when i woke it up again i had no sound at all. It says there are no devices installed.
ive uninstalled sound blaster, ive downloaded new ones but it now wont install as it says there is no device for it.
ive system restored and still no sound.

 

[AeonSoul]

check if your audio card is visible to the windows components and if it is try to restore the drivers from there.

 

[Anomaly123]

through device manager?
theres 1 under sound ect. and its intel display audio, i cant update/rollback the driver and when i uninstall it, it just reinstalls itself
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EDIT
never mind, i shut it down for an hour and now its back to normal. bit worrying though.