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Some Winsock Functions May Cause a High CPU Load

This article was previously published under Q327752
This article has been archived. It is offered "as is" and will no longer be updated.
Some Winsock functions may cause a high CPU load. These functions include GetSockOpt, SetSockOpt, and GetPeerName.
This is caused by a problem in the Msafd.dll DLL.

Service Pack Information

To resolve this problem, obtain the latest service pack for Microsoft Windows 2000. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
260910 How to Obtain the Latest Windows 2000 Service Pack

Hotfix Information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, submit a request to Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site: Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.The English version of this fix has the file attributes (or later) 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   Version        Size     File name   --------------------------------------------------------   19-Nov-2001  23:42  5.0.2195.4667  118,896  Afd.sys   16-Aug-2002  22:19  5.0.2195.6020  105,232  Msafd.dll           25-Jul-2002  01:03  5.0.2195.5975  313,264  Tcpip.sys   31-Jul-2001  03:15  5.0.2195.3988   16,240  Tdi.sys   16-Aug-2002  22:19  5.0.2195.4874   17,680  Wshtcpip.dll     				

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 Microsoft Windows 2000 Service Pack 4.
For additional information about how to obtain a hotfix for Windows 2000 Datacenter Server, click the article number below to view the article in the Microsoft Knowledge Base:
265173 The Datacenter Program and Windows 2000 Datacenter Server Product

Article ID: 327752 - Last Review: 02/27/2014 21:14:44 - Revision: 3.7

Microsoft Windows 2000 Server SP1, Microsoft Windows 2000 Service Pack 3, Microsoft Windows 2000 Server SP2, Microsoft Windows 2000 Advanced Server SP1, Microsoft Windows 2000 Advanced Server SP2, Microsoft Windows 2000 Advanced Server SP3, Microsoft Windows 2000 Professional SP1, Microsoft Windows 2000 Professional SP2, Microsoft Windows 2000 Service Pack 3

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