刚才得到微软证实，XP确实存在这个问题，具体如下：
http://support.microsoft.com/support/kb/articles/q311/8/97.aspPower-Management Issues with Windows XP and Intel PIII-M CPU
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The information in this article applies to:
Microsoft Windows XP Home Edition
Microsoft Windows XP Professional
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IMPORTANT: This article contains information about editing the registry. Before you edit the registry, make sure you understand how to restore it if a problem occurs. For information about how to do this, view the "Restoring the Registry" Help topic in Regedit.exe or the "Restoring a Registry Key" Help topic in Regedt32.exe.
SYMPTOMS
When you are using a notebook computer that has a Mobile Intel Pentium III Processor -M "Tualatin" CPU that features the Intel SpeedStep Technology, you may experience one of the following symptoms:
The battery life for the notebook computer may be less than you expect.
The notebook computer may become excessively warm.
CAUSE
This problem can occur if you do not have an updated driver file (P3.sys) so that Windows XP can fully support the Intel SpeedStep Technology on computers that have an Intel PIII-M "Tualatin" CPU.
RESOLUTION
There are three steps needed to correct this issue:
Obtain an updated BIOS from your notebook computer manufacturer. For information about how to update the BIOS, please contact your notebook computer manufacturer.
Apply the update below.
Update the registry per the "Enabling the New Driver to Use SpeedStep Technology" instructions below.
A supported fix is now available from Microsoft, but it is only intended to correct the problem described in this article and should be applied only to systems experiencing this specific problem. This fix may receive additional testing at a later time, to further ensure product quality. Therefore, if you are not severely affected by this problem, Microsoft recommends that you wait for the next Windows XP service pack that contains this fix.
To resolve this problem immediately, download the fix as instructed below or contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone numbers and information on support costs, please go to the following address on the World Wide Web:
http://support.microsoft.com/directory/overview.aspNOTE: In special cases, charges that are normally incurred for support calls may be canceled, if a Microsoft Support Professional determines that a specific update will resolve your problem. Normal support costs will apply to additional support questions and issues that do not qualify for the specific update in question.
This update is available on the Microsoft Windows Update Web site.
Download the "Intel Pentium III Processor Update" now
The English version of this fix should have the following file attributes or later:
Date Time Version Size File name
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29-Aug-2001 15:57 5.1.2600.10 37,248 P3.sys
29-Aug-2001 16:20 1,521 P3qfe.inf
Enabling the New Driver to Use SpeedStep Technology
WARNING: Using Registry Editor incorrectly can cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that problems resulting from the incorrect use of Registry Editor can be solved. Use Registry Editor at your own risk.
For information about how to edit the registry, view the "Changing Keys and Values" Help topic in Registry Editor (Regedit.exe) or the "Add and Delete Information in the Registry" and "Edit Registry Data" Help topics in Regedt32.exe. Note that you should back up the registry before you edit it. If you are running Windows NT or Windows 2000, you should also update your Emergency Repair Disk (ERD).
After you install the fix from the Microsoft Windows Update Web site, you must make the following registry change:
Start Registry Editor (Regedit.exe).
Locate and click the following key in the registry:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\P3\Parameters
You may have to create the Parameters key if it is not already present.
On the Edit menu, click Add Value, and then add the following registry value:
Value name: HackFlags
Data type: REG_DWORD
Radix: Hexadecimal
Value data: 1
Quit Registry Editor.
Arie你的机器应该没有问题，应该是老奔三的，没有这问题