hello guys this is my first question in this site , so my lenovo z50-70 just lost it sound with that red x mark on the audio picture , i tried to fix it and when reached that step that you have to unistall your driver in your device manager , after i restarted my drivers werent there actually i didnt have Any Audio,Video and game controllers in my device manager. as said in the guides it should install it back again but it didnt !
Have you run Lenovo Vantage in order to get any BIOS or driver updates directly from Lenovo? It's a fairly easy thing to do first.
If it's not appearing in device manager at all, do you have it disabled in BIOS?
so i managed to update my bios but nothing changed , i actually found the drivers they were under the System devices tab and this is what i found in the device statuse :
Windows cannot verify the digital signature for the drivers required for this device. A recent hardware or software change might have installed a file that is signed incorrectly or damaged, or that might be malicious software from an unknown source. (Code 52)