BIOS asks for password after update

[rafterman23]

I have a Lenovo Z40-70 laptop which originally shipped with Windows 8. Because of this, the BIOS is configured to boot UEFI things before "Legacy" things. I dislike WIndows 8 so I put Windows 7 on it about a year ago, then went into the BIOS and switched the boot mode from UEFI to Legacy, worked great for a year.

Recently (stupidly) updated my BIOS - the settings inside the BIOS reset to attempting to boot UEFI things. The thing is, when I tried to go into the BIOS and switch it back to Legacy again (so that I could boot Windows 7) it prompted me for a password.

I know for a fact that I have never put a BIOS password on my machine and I have tried every password (even manufacturer "backdoor" default passwords) with no dice. I've looked into using Hiren's to remove the BIOS password, but there's two problems with it. A, Hiren's might not support my particular board, and B, Hiren's also doesn't support UEFI (so when I have the Hiren's disc in the machine, the laptop can't see it because it isn't UEFI.)

I also took apart the laptop and looked for the CMOS jumper; there isn't one. Also, the BIOS battery is soldered onto the board, so I can't remove that to clear it.

I have a Ubuntu disc (which does support UEFI and does run) so I can still manipulate things from inside Ubuntu. Does anyone know how I can get rid of this BIOS password?

 

[COLGeek]

You should contact Lenovo for assistance. We can't help with security bypass questions as we have no means to verify the legal ownership of the device in question. Sorry.