[New functions or enhancements] - Improved memory resource allocation process to reserve more memory space for optional hardware devices.
[Problem fixes] - Fixed an issue that might return a time-out error in SATA compatibility mode. - Fixed an issue where the UEFI BIOS might not be updated correctly when running the BIOS update after resuming normal operation from standby/sleep state. - Fixed an issue where intranet account login might fail with ThinkVantage Hardware Password Manager. - Improved cooling fan noise on specific models.
BIOS Update Utility for Windows 7 (32-bit, 64-bit), Vista (32-bit, 64-bit), XP - ThinkPad T420s, T420si http://support.lenovo.com/en_US/downloads/detail.page?LegacyDocID=MIGR-77010#version