You receive a Stop 0x9F error when you wake a Windows Vista-based computer that is connected to an IEEE 1394-based device

When you wake a Windows Vista-based computer from sleep, you may receive a Stop 0x9F error message that resembles the following: This problem occurs when a device that uses an Institute of Electrical and Electronics Engineering (IEEE) 1394 connection is connected to the computer. For example, the device may be a Maxtor One Touch II 300GB model external hard disk, an Apple iPod, or some other IEEE 1394-based device.

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:

Update information

To resolve this problem, install update 929762. To install this update, visit the following Microsoft Web site: The following files are available for download from the Microsoft Download Center:


Update for Windows Vista (KB929762)

Download the KB929762 package now. (http://www.microsoft.com/downloads/details.aspx?FamilyId=9325F882-CF13-458D-9F86-6A3DD4148554)

Update for Windows Vista, 64-bit versions (KB929762)


Download the KB929762 package now. (http://www.microsoft.com/downloads/details.aspx?FamilyId=1E9FBCAB-9C91-43A6-9FE9-9B21438F10ED)

Release Date: January 30, 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.

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, x86-based versions

Windows Vista, 64-bit versions

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.

For more information, click the following article numbers to view the articles in the Microsoft Knowledge Base:
The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.