Article ID: 306458 - View products that this article applies to.
This article was previously published under Q306458
Advanced Micro Devices (AMD) offers PowerNow! technology on AMD mobile Athlon 4 and mobile Duron processors. The PowerNow! technology adjusts the processor's performance and power consumption by dynamically adjusting the processor's operating frequency and voltage. Windows XP requires an additional driver (the Amdk7.sys driver) to enable the AMD PowerNow! functionality. Laptop computers that are based on these mobile AMD processors and are shipped with Windows XP installed by the manufacturer are likely to have this driver already installed. If you reinstall Windows XP, you must also install the Amdk7.sys driver to use the PowerNow! technology.
The Amdk7.sys driver is necessary to enable Windows XP support for AMD PowerNow! technology on computers that use a mobile Athlon 4 or mobile Duron processor.
To resolve this problem, obtain the latest service pack for Windows XP. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
322389The following file is available for download from the Microsoft Download Center:
(http://support.microsoft.com/kb/322389/EN-US/ )How to Obtain the Latest Windows XP Service Pack
Release Date: October 17, 2001
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For additional information about how to download Microsoft Support files, click the following article number to view the article in the Microsoft Knowledge Base:
119591Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help to prevent any unauthorized changes to the file. The English version of this fix should have the following file attributes or later:
(http://support.microsoft.com/kb/119591/EN-US/ )How to Obtain Microsoft Support Files from Online Services
Date Time Version Size File name -------------------------------------------------- 29-Aug-2001 15:57 5.1.2600.10 32,768 Amdk7.sys 29-Aug-2001 16:19 1,562 K7qfe.inf
To Install the DriverImportant This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/322756/ )How to back up and restore the registry in Windows
To install the and configure the driver:
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was first corrected in Windows XP Service Pack 1.
The new Amdk7.sys driver for Windows XP is also available from the Microsoft Windows Update Web site
(http://windowsupdate.microsoft.com). If you install the driver from the Windows Update Web site, the driver is installed and configured automatically on computers that support the use of the driver.