Problems may occur when you try to transfer files to or from a device that is connected to a USB 2.0 hub in Microsoft Windows XP
On This PageSYMPTOMS
You try to transfer files to or from a device that is connected to a universal serial bus (USB) 2.0 hub in Microsoft Windows XP. When you do this, you may experience one or more of the following symptoms:
This issue may also occur if the device is internal and is connected internally to the internal USB 2.0 hub. For example, this problem might occur if you use a portable computer that has an internal Bluetooth radio that is connected to an internal USB 2.0 hub. When you use this Bluetooth device to transfer the files to another device, you may experience the symptoms that are described in the "Symptoms" section. CAUSE
This problem may occur when there is lots of traffic on the USB 2.0 hub, and you transfer files to a low-speed or a full-speed USB device. The problem does not occur when you transfer files to a high-speed USB device.
For more information about USB 2.0 data transfer rates, see the "More Information" section. Additionally, this problem has been observed on computers that use Transmeta processors (CPUs). RESOLUTIONHotfix informationA 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: http://support.microsoft.com/contactus/?ws=support (http://support.microsoft.com/contactus/?ws=support) 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.File informationThe 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.
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\USB\EnSoftRetry The registry key is configured to have a DWORD value of 1. This value enables the Soft-Retry code path that is used in this hotfix. When this hotfix is applied, a USB transfer that fails for specific reasons is silently retried instead of completed and given a "failure" status. When this process occurs, USB client device drivers may not receive notification that communication with the device failed because of a lower-level error on the USB bus. If the affected USB device driver requires accurate error reporting to function correctly, you should not apply this hotfix. Or, you should disable the Soft-Retry functionality by setting the EnSoftRetry registry value to 0. A Soft-Retry process will occur when the following conditions are true:
http://www.intel.com/technology/usb/ehcispec.htm (http://www.intel.com/technology/usb/ehcispec.htm) STATUSMicrosoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section. MORE INFORMATIONData transfer rates that USB 2.0 supportsUSB 2.0 supports the following maximum data transfer rates, depending on the amount of bus bandwidth that a device requires:
824684 (http://support.microsoft.com/kb/824684/)
Description of the standard terminology that is used to describe Microsoft software updates
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