IBM笔记本出厂时BIOS的版本一般已经被刷成了当时最新版，其中有的已经是经过若干次更新的版本了。但随着不断发现软硬件的问题（更多体现在兼容性方 面），厂商则不断修正BIOS程序。刷新到最新版本的BIOS则可以容易地解决这些兼容性的问题。很简单的例子，早期的P2级别CPU的笔记本认不到较新 的大容量硬盘，升级到最新的BIOS则可以完全识别并正常使用。
升级BIOS有风险，无论这个风险有多大，但它是确实存在的。所以决定升级之前应该仔细看看，新版本是否对你来说很重要，是否经过了刷新你的电脑在性能和稳定性上有所改进，而这些改进恰恰是你所需要的。IBM笔记本的每次BIOS版本的更新都有详细的变化说明：
比如T23的BIOS从最初的1.00到最新的1.17版本，已经连续推出了16个新版本了，每次新版本的出现，均是在原版本的基础上，修订了某些错误和bug。比如变动比较大的1.04版，就有如下的变动，新增了4项功能，修复了12项错误：
<1.04 - 1AET47WW>
- (New) Support PS2.EXE PREFMemory Enable command which makes it possible
to install the Matrox G450 driver on Windows NT4.
- (New) Enable the IDE DMA setting if system does not boot from network
to speed up hibernation wake up on Windows Me, 2000, and XP.
- (New) Enhance BIOS image data integrity at flash update.
- (New) Remove RIPL function support.
- (Fix) PS2.EXE USBBIOS Disable does not work correctly.
- (Fix) If hard disk drive (HDD) class USB device is attached, then 2
different drive letters are assigned to it on Windows 98 and Me.
- (Fix) Netfinity utility does not work on OS/2.
- (Fix) POST 195 error occurs by pressing the F1 key several times during
system boot.
- (Fix) DVI ICON appears on S3Display tab.
- (Fix) Clock generator may cause invalid condition at POST.
- (Fix) VGA color DAC register test failure
- (Fix) HDD spindle turns off automatically after 3 minutes on ACPI
operating system.
- (Fix) TV screen becomes warped, displays greenish colors, or wavy noise
appears.
- (Fix) Once an ACPI operating system has booted up, some items in the
BIOS setup becomes operating system controlled. There is no way
to exit from this condition except initialization of CMOS.
- (Fix) Brightness level setting of high is automatically disabled, if
brightness level is changed from ThinkPad utility.
- (Fix) If the system is docked to the docking station which includes a
HDD, then Hibernation on APM operating system may cause system
hang.
最新的1.17版也修复了3个错误。追求完美的网友可能会忍不住了：这么多错误怎么能容忍！呵呵，那就看下一步吧。
手把手教你升级IBM笔记本BIOS
《手把手教你升级IBM笔记本BIOS》摘要： IBM笔记本出厂时BIOS的版本一般已经被刷成了当时最新版，其中有的已经是经过若干次更新的版本了。但随着不断发现软硬件的问题（更多体现在兼容性方 面），厂商则不断修正BIOS程序。刷新到最新啊�
