Sound isnt working

[Aydinz]

when i turn on my computer starts up and then the sound cuts out after i open another application, i think it is something to do with my sound driver. So i think im going to try to reinstall my sound driver but i cant find the link anywhere, i have a Realtek ALC850 Driver, so i need someone to provide me the kext download or if there is another problem please help me fix this.

Thank you