hp 4540s

Hello, I followed the guide to installing El Capitan step by step and everything works fine except audio. I followed RehabMan's guide. I also followed this: "Audio: After installing new/updated kexts or after the initial installation, you may lose audio. To fix: - reboot without caches (hit...

I need help to install Mountain Lion on Hp ProBook 4540s and ,Is there a solution to the problem Wifi driver? :-o

I can't find kext or solve for this kind of wifi. Some guys can help me? Thanks