My laptop Lenovo Z580 was in a good health since I have updated bios from Lenovo official website (new version 5FCN95WW ). Problems found : ***FN + F4 don't work ***only one mode in thermal Management works (dépoussiérage=dust). So I repported this in Lenovo website ... no answer and no sollution. I really want to backup my old BIOS update knowing that I have really try many thing. Please Help. (Sorry I don't really Know where to pute this topic and sorry for my bad english) Thanks.