BIOS Update Bootable CD for Windows 8 (32-bit, 64-bit), 7 (32-bit, 64-bit), Vista (32-bit, 64-bit), XP – ThinkPad T420, T420i

NameOperating SystemVersionReleasedDownload
BIOS Update Bootable CD
83uj28us.iso
36.48 MB
Windows 7 32bit,
Windows 7 64bit,
Windows 8 32bit,
Windows 8 64bit,
Windows Vista 32bit,
Windows Vista 64bit,
Windows XP
1.4617 Jul 2013 Download
README for BIOS Update Bootable CD
83uj28uc.txt
26.77 KB
Windows 7 32bit,
Windows 7 64bit,
Windows 8 32bit,
Windows 8 64bit,
Windows Vista 32bit,
Windows Vista 64bit,
Windows XP
1.4617 Jul 2013 Download

The BIOS Update CD can boot the computer disregarding the operating systems and update the UEFI BIOS (including system program and Embedded Controller program) stored in the ThinkPad computer to fix problems, add new functions, or expand functions as noted below.

Note: Please create the CD/DVD from the ISO image file and install it. The contents of the BIOS Update CD cannot be shown by Windows Explorer.

Use the link below to obtain the BIOS in other file formats:


Supported ThinkPad Systems


  • T420, T420i

Supported Operating Systems


  • Windows 8 32-bit, 64-bit
  • Windows 7 32-bit, 64-bit
  • Windows Vista 32-bit, 64-bit
  • Windows XP Professional SP3