Once you have the proper version installed, load the default settings before proceeding.
If you have a newer bios installed you can downgrade it: in bios setup enable the Bios Back Flash option and flash the required version (9ACN26WW or 9BCN26WW). ftpw.exe or fptw64.exe depending on your win version.Please note had problems with this editor. Bios 9ACN26WW on G50-70 or 9BCN26WW on Z50-70 installed.Use the informations contained in this document at your own risk, I take no responsibility for any damage. It worked for me and some friends so I decided to share it. This is a DANGEROUS procedure and it may damage your laptop if you make mistakes. Building a CustoMac Hackintosh: Buyer's Guide
