Can't get into Yosemite, have IOPlatformPluginDriver missing

I had Yosemite running, then changed a sound driver in Multibeast I shouldn't have, and now get kernel panics when I try to boot.

I have a dual boot system off one drive at the moment and am running Windows 10 as well.

My system is: MB Gigabyte GA-Z77X-UD5H BIOS UEFI V f-14 CPU Intel Core i5 3570K Ivy Bridge 3.4 Ghz Graphics nvidia geforce GT 640 2048 intel processor is g12108-002 i5

I looked up the last line where I seem to be hanging...

AppleLPC::start - could not find IOPlatformPlugin driver

And found that I may be missing FakeSMC.kext.

How can I get to that /Extra/Extensions from terminal?

I am guessing that may not be my only issue, but it is recurring.

submitted by hickdawg
[link] [comment]
What is missing? Please comment to help!

...[► Source]

For more info try www.iatkos.net