When you wake a Windows Vista-based computer from sleep, you may receive a Stop error message that resembles the following: This problem occurs if you have installed the update that is described in the following Microsoft Knowledge Base article: Note Update 929762 is available as a critical update from the following Microsoft Web site:

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This problem occurs because a delayed procedure call (DPC) routine tries to perform an unauthorized operation.

Note Not all "Stop 0x000000B8" errors are caused by this problem.

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Service pack information

To resolve this problem, obtain the latest service pack for Windows Vista. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

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Update information

The following files are available for download from the Microsoft Download Center:

Download the Update for Windows Vista (KB936150) package now. (http://www.microsoft.com/downloads/details.aspx?FamilyId=135C8782-2E95-433F-97BB-78D8CB6D5E84)

Download the Update for Windows Vista 64-bit versions (KB936150) package now. (http://www.microsoft.com/downloads/details.aspx?FamilyId=7FB254EC-9BE1-4483-AA35-21197007DFAC)

Release Date: July 24, 2007

For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base: Microsoft 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 prevent any unauthorized changes to the file.

Prerequisites

No prerequisites are required.

Restart requirement

You must restart the computer after you apply this update.

Update replacement information

This update does not replace a previously released update.

File information

The English version of this update 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, 32-bit versions

File name	File version	File size	Date	Time	Platform
Sbp2port.sys	6.0.6000.20614	81,080	07-Jun-2007	02:42	x86
Update.mum	Not applicable	2,021	07-Jun-2007	13:25	Not applicable
X86_sbp2.inf_31bf3856ad364e35_6.0.6000.20614_none_43d53268121ecc6d.manifest	Not applicable	1,475	07-Jun-2007	13:26	Not applicable

Windows Vista, 64-bit versions

File name	File version	File size	Date	Time	Platform
Amd64_sbp2.inf_31bf3856ad364e35_6.0.6000.20614_none_9ff3cdebca7c3da3.manifest	Not applicable	1,477	07-Jun-2007	13:30	Not applicable
Sbp2port.sys	6.0.6000.20614	95,416	07-Jun-2007	04:28	x64
Update.mum	Not applicable	2,021	07-Jun-2007	13:25	Not applicable

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Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section. This problem was first corrected in Windows Vista Service Pack 1.

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The symptoms of a Stop error vary depending on the failure options that have been configured in Windows.

For more information about how to configure system failure options, click the following article number to view the article in the Microsoft Knowledge Base: For more information, click the following article number to view the article in the Microsoft Knowledge Base:

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