Article ID: 927827 - View products that this article applies to.
When you connect an IEEE 1394a device to a computer that is running Windows Vista, Windows Vista does not enumerate the device. However, if you connect the same device to a computer that is running Microsoft Windows XP, Windows XP enumerates the device successfully.
Note An IEEE 1394a device may also be referred to as a FireWire device.
Windows Vista only enumerates a device that sets its link status to request enumeration. If an IEEE 1394a device does not report the correct status of its link, the IEEE 1394 stack in Windows Vista does not enumerate the device.
Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/322756/ )How to back up and restore the registry in Windows
To work around this problem, for non-compliant IEEE 1394a devices, configure Windows Vista to enumerate inactive IEEE 1394 devices. To do this, follow these steps:
You may be able to obtain a firmware update for the IEEE 1394a device to resolve this problem. To determine whether a firmware update is available for the device, contact the device manufacturer or the device vendor.
For information about your hardware manufacturer, visit the following Web site:
http://support.microsoft.com/gp/vendors/en-usMicrosoft provides third-party contact information to help you find technical support. This contact information may change without notice. Microsoft does not guarantee the accuracy of this third-party contact information. The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, regarding the performance or reliability of these products.
Article ID: 927827 - Last Review: March 15, 2007 - Revision: 1.7