On a computer that is running Windows Server 2008, Windows Vista, or Windows Vista Service Pack 1 (SP1), you may receive the following Stop error message:
Notes

• The four parameters in this error message vary, depending on the computer's configuration.
• Not all "0x000000D1" Stop errors are caused by this problem.

Typically, this issue occurs on a multiprocessor computer.

This problem occurs because the Netio.sys file prematurely releases a lock. After the lock is released, the Netio.sys file tries to modify a list that was protected by the lock. This behavior corrupts the list and triggers the Stop error.

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. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

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, contact 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.

Prerequisites

No prerequisites are required.

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other hotfixes.

File information

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 item in Control Panel.

Windows Vista and Windows Server 2008 file information notes

• The files that apply to a specific product or milestone (RTM, SPn) can be identified by examining the file version numbers as shown in the following table.
  Collapse this tableExpand this table

  Version	Product	Milestone	Service branch
  6.0.6000.20xxx	Windows Vista	RTM	LDR
  6.0.6001.22xxx	Windows Vista SP1 and Windows Server 2008 SP1	SP1	LDR

• Service Pack 1 is integrated into Windows Server 2008. Therefore, RTM milestone files apply only to Windows Vista. RTM milestone files have a 6.0.0000.xxxxxx version number.
• The .manifest files and the .mum files that are installed in each environment are listed separately in the "Additional file information for Windows Server 2008 and for Windows Vista" section. These files and their associated .cat (security catalog) files are critical to maintaining the state of the updated component. The .cat files are signed with a Microsoft digital signature. The attributes of these security files are not listed.

For all supported 32-bit versions of Windows Server 2008 and of Windows VistaFor all supported 64-bit versions of Windows Server 2008 and of Windows VistaFor all supported Windows Server 2008 Itanium-Based Systems operating systems

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

Additional file information for Windows Server 2008 and for Windows Vista

Additional files for all supported 32-bit versions of Windows Server 2008 and of Windows VistaAdditional files for all supported 64-bit versions of Windows Server 2008 and of Windows VistaAdditional files for all supported Windows Server 2008 Itanium-Based Systems operating systemsFor more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base: