Comment 5 for bug 1503627

dmidecode -s bios-release-date
01/23/2015

dmidecode -s bios-version
N10ET28W (1.05 )

BIOS changes since below if it helps:

********************

CHANGES IN THIS RELEASE
Version 1.17
UEFI: 1.17 / ECP: 1.13

    [Important] Security fix addresses LEN-2015-002 SMM "Incursion" Attack and some security fixes. (Note) If the UEFI BIOS has been updated to version 1.17 or higher, it is no longerable to roll back to the version before 1.17 for security improvement.

********************

CHANGES IN THIS RELEASE
  Version 1.15

[Important updates]
- Added support for Microsoft Windows 10 64bit.
- Fix an issue where system cannot boot when Execution Prevention in Security
  Memory Protection was set to disabled and saved on ThinkPad Setup with
  UEFI BIOS version 1.13.

[New functions or enhancements]
- Supported the 60Hz refresh rate of 4K (3840 x 2160) resolution monitor.
        (Note) Please reinstall Intel HD Graphics Driver to take effect.
- Updated the CPU microcode.

[Problem fixes]
  Nothing.

********************

CHANGES IN THIS RELEASE
  Version 1.12

[Important updates]
  Nothing.

[New functions or enhancements]
- Supported i3-4030U and i5-4300U CPU.
- Supported 16GB memory.

[Problem fixes]
- Fixed an issue where USB Composite Device was displayed as unspecified device
  in Devices and Priters Control Panel when Intel Network Frame Forwarder (NFF)
  was enabled.

********************

CHANGES IN THIS RELEASE
  Version 1.07

[Important updates]
- Mitigated the risk of security vulnerability related to DRAM Row Hammering.

[New functions or enhancements]
- Updated the CPU microcode.

[Problem fixes]
- Fixed an issue where the End/Insert key did not work correctly in Fn Key Lock
  state.

********************

CHANGES IN THIS RELEASE
  Version 1.06

[Important updates]
  Nothing.

[New functions or enhancements]
- Updated the CPU microcode.
- Added support for Intel Network Frame Forwarder (NFF).
  (Note)
  Intel NFF will be enabled from the UEFI BIOS version 1.06. But, it will be
  disabled when updating the UEFI BIOS to version 1.06 or higher from version
  1.05 or lower. Setup Default by the F9 key in ThinkPad Setup will enable it.
  It can be enabled or disabled in the ThinkPad Setup.

[Problem fixes]
  Nothing.