Microsoft KB Archive/891960

= FIX: The DHCP client causes high CPU utilization in Windows CE .NET 4.2 =

Article ID: 891960

Article Last Modified on 5/27/2005

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APPLIES TO


 * Microsoft Windows CE .NET 4.2

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SYMPTOMS
High CPU utilization occurs. The user interface responds slowly. Threads that are lower than the regular priority level do not have a chance to run. The problems occur in Microsoft Windows CE .NET 4.2.



CAUSE
The Dynamic Host Configuration Protocol (DHCP) client is trying to contact the DHCP server. However, the network card is in a disconnected state.



Software update information
A supported software update is now available from Microsoft as Windows CE 4.20 Core OS QFE 891960. To resolve this problem immediately, click the following article number for information about obtaining Windows CE Platform Builder and core operating system software updates:

837392 How to locate core operating system fixes for Microsoft Windows CE Platform Builder products

Prerequisites
This update is supported only if all previously issued updates for this product have also been installed.

Restart requirement
After you install this update, you must perform a clean build of the whole platform. To clean the platform, click Clean on the Build menu. To build the platform, click Build Platform on the Build menu. You do not have to restart your computer after you apply this update.

Update replacement information
This update does not replace any other updates.

File information
The English version of this package has the file attributes (or later file attributes) that are listed in the following table.   Date         Time      Size    File name --

04-Feb-2005 21:23  7,582,720  Wincepb42-050204-kb891960-armv4.msi 04-Feb-2005 21:24  7,582,720  Wincepb42-050204-kb891960-armv4i.msi 04-Feb-2005 21:24  7,590,400  Wincepb42-050204-kb891960-mipsii.msi 04-Feb-2005 21:24  7,590,400  Wincepb42-050204-kb891960-mipsii_fp.msi 04-Feb-2005 21:24  7,592,960  Wincepb42-050204-kb891960-mipsiv.msi 04-Feb-2005 21:24  7,592,960  Wincepb42-050204-kb891960-mipsiv_fp.msi 04-Feb-2005 21:23  7,578,624  Wincepb42-050204-kb891960-sh3.msi 04-Feb-2005 21:23  7,577,600  Wincepb42-050204-kb891960-sh4.msi 04-Feb-2005 21:23  7,561,216  Wincepb42-050204-kb891960-x86.msi The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.   Date         Time     Size   File name --

Path: Public\Common\Oak\Lib\Armv4\Debug 27-Jan-2005 17:43  316,434  Dhcp.lib 27-Jan-2005 17:43  102,400  Dhcp.pdb

Path: Public\Common\Oak\Lib\Armv4\Retail 27-Jan-2005 17:43  179,094  Dhcp.lib 27-Jan-2005 17:43  102,400  Dhcp.pdb

Path: Public\Common\Oak\Lib\Armv4i\Debug 27-Jan-2005 17:44  316,752  Dhcp.lib 27-Jan-2005 17:44  102,400  Dhcp.pdb

Path: Public\Common\Oak\Lib\Armv4i\Retail 27-Jan-2005 17:43  179,410  Dhcp.lib 27-Jan-2005 17:43  102,400  Dhcp.pdb

Path: Public\Common\Oak\Lib\Mipsii\Debug 27-Jan-2005 17:44  324,610  Dhcp.lib 27-Jan-2005 17:44  102,400  Dhcp.pdb

Path: Public\Common\Oak\Lib\Mipsii\Retail 27-Jan-2005 17:44  184,344  Dhcp.lib 27-Jan-2005 17:44  102,400  Dhcp.pdb

Path: Public\Common\Oak\Lib\Mipsii_fp\Debug 27-Jan-2005 17:44  324,636  Dhcp.lib 27-Jan-2005 17:44  102,400  Dhcp.pdb

Path: Public\Common\Oak\Lib\Mipsii_fp\Retail 27-Jan-2005 17:44  184,384  Dhcp.lib 27-Jan-2005 17:44  102,400  Dhcp.pdb

Path: Public\Common\Oak\Lib\Mipsiv\Debug 27-Jan-2005 17:44  327,914  Dhcp.lib 27-Jan-2005 17:44  102,400  Dhcp.pdb

Path: Public\Common\Oak\Lib\Mipsiv\Retail 27-Jan-2005 17:44  186,598  Dhcp.lib 27-Jan-2005 17:44  102,400  Dhcp.pdb

Path: Public\Common\Oak\Lib\Mipsiv_fp\Debug 27-Jan-2005 17:44  327,940  Dhcp.lib 27-Jan-2005 17:44  102,400  Dhcp.pdb

Path: Public\Common\Oak\Lib\Mipsiv_fp\Retail 27-Jan-2005 17:44  186,638  Dhcp.lib 27-Jan-2005 17:44  102,400  Dhcp.pdb

Path: Public\Common\Oak\Lib\Sh3\Debug 27-Jan-2005 17:44  289,138  Dhcp.lib 27-Jan-2005 17:44  102,400  Dhcp.pdb

Path: Public\Common\Oak\Lib\Sh3\Retail 27-Jan-2005 17:44  169,040  Dhcp.lib 27-Jan-2005 17:44  102,400  Dhcp.pdb

Path: Public\Common\Oak\Lib\Sh4\Debug 27-Jan-2005 17:44  289,042  Dhcp.lib 27-Jan-2005 17:44  102,400  Dhcp.pdb

Path: Public\Common\Oak\Lib\Sh4\Retail 27-Jan-2005 17:44  168,756  Dhcp.lib 27-Jan-2005 17:44  102,400  Dhcp.pdb

Path: Public\Common\Oak\Lib\X86\Debug 27-Jan-2005 17:43  287,200  Dhcp.lib 27-Jan-2005 17:43  102,400  Dhcp.pdb

Path: Public\Common\Oak\Lib\X86\Retail 27-Jan-2005 17:43  157,348  Dhcp.lib 27-Jan-2005 17:43  102,400  Dhcp.pdb



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.



MORE INFORMATION
When the registry setting for the  setting is set to a high number, you experience high CPU utilization. When you use the default registry setting for the  setting, you receive a message that the DHCP server is unavailable.

Keywords: kbbug kbfix kbqfe KB891960

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