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You may experience either of the following symptoms:
1394 devices do not enumerate when plugged into the 1394 bus.
1394 devices can disappear from the 1394 bus when other 1394 devices are plugged into the 1394 bus.
The 1394 OHCI host controller driver contains a problem that sometimes prevents stable enumeration because it cannot acquire a consistent gap count across all nodes.
Service pack information
To resolve this problem, obtain the latest service pack for Windows XP. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
322389 How to obtain the latest Windows XP service pack
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 tool in Control Panel.
Date Time Version Size File name Platform ------------------------------------------------------------------- Windows XP SP1 07-Oct-2002 12:57 5.1.2600.101 49,792 1394bus.sys Windows XP 24-Aug-2002 03:20 5.1.2600.100 46,720 61883.sys Windows XP 30-Aug-2002 09:55 5.1.2600.100 24,448 Sonydcam.sys Windows XP Windows XP SP2 07-Oct-2002 13:01 5.1.2600.1130 50,688 1394bus.sys Windows XP
For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base:
119591 How to obtain Microsoft support files from online services
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.
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 Microsoft Windows XP Service Pack 2.