No sound at all after reboot (No driver installed)

[zozeee]

Hello guys, I just restarted my computer yesterday and got no sound at all.. I really don't know what to do. Here's what I can see: There's a white cross in a red circle in the audio bar (No audio device is installed) and in the device manager, there's only yellow triangles under audio controllers. Here's a screenshot when I tried to uninstall everything and let windows update do the job.
http://prntscr.com/ilt2e3
I tried to install Realtek ALC269 High-Definition Audio Driver at this link since i'm pretty sure after a check that this is my Audio Card..
http://www.dell.com/support/home/fr/fr/frbsdt1/Drivers/DriversDetails?driverId=594D4
It just won't let me install it:
https://prnt.sc/ilt3w7

So.. I really don't know what to do. It seems that my motherboard maybe doesn't recognize my audio card anymore. I'll ask your help then.
Here's a complete AIDA64 report of my computer that you can read:

https://paste.ee/p/ouqje

Thanks a lot guys.
PS: I'm French so my computer language is mainly french, even though there's some japanese in here. My computer is a laptop and is running Windows 7 (x64).

 

[noel_prg_la1979]

what kind of laptop are you using? Use either CPU-Z or Speccy (rather than AIDA64) to gather specs of your computer.
do NOT use the Realtek drivers from Dell as they are for Dell computers only.