2010-08-21 18:55 
老徐 Dell E6400 每次开机半个小时左右，机器 CPU 就 100% ，会感觉到底部发热， 风扇高速运转。
查看软件因素，重新安装 Windows7 Enterprise 后依然如故。
根据同事的指点，安装了 Core Temp 软件，检测每个 Core 的温度，发现系统 100% CPU 时，频率都是 800MHz，而不是可以达到的最高 2800 MHz.
查看这个帖子： http://www.tech-forums.net/pc/f9/cpu-bogging-down-no-apparent-reason-vista-home-premium-208684/
叫 Dell 更换了 CPU 风扇，一切都正常了，原来 Skype 每次启动都 100% CPU 的情况也没有了。
CPU 到 100% 时，系统日志会报如下信息：
The speed of processor 0 in group 0 is being limited by system firmware. The processor has been in this reduced performance state for 71 seconds since the last report.
The speed of processor 1 in group 0 is being limited by system firmware. The processor has been in this reduced performance state for 71 seconds since the last report.
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居然还有这种事情，DELL太扯了吧？