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A USB 1.1 device that is plugged into an EHCI controller on a Windows Vista Service Pack 1-based or Windows Server 2008-based computer disappears from the system after the system is restarted

This article has been archived. It is offered "as is" and will no longer be updated.
On a computer that is running Windows Vista Service Pack 1 or Windows Server 2008, you insert two USB 2.0 high-speed devices and a USB 1.1 full speed device into the same Enhanced Host Controller Interface (EHCI) controller. After you restart the computer, the USB 1.1 device disappears from the system. This problem occurs occasionally and persits until you unplug the USB 1.1 device and then plug it back in.
This problem occurs because a timing issue prevents the status change of the USB device from being reported to the system.

Hotfix information

Important Windows Vista and Windows Server 2008 hotfixes are included in the same packages. However, only one of these products may be listed on the “Hotfix Request” page. To request the hotfix package that applies to both Windows Vista and Windows Server 2008, just select the product that is listed on the page.

A 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 the problem described in this article. 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: 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.


To apply this hotfix on a Windows Vista-based computer, you must have Windows Vista Service Pack 1 installed on the computer. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
935791 How to obtain the latest Windows Vista service pack
There are no prerequisites for installing this hotfix.

Restart requirement

You have to restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

File information

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 item in Control Panel.

Windows Vista and Windows Server 2008 file information notes

  • The files that apply to a specific product, milestone (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table.
    VersionProductMilestoneService branch
    6.0.6000.16xxxWindows VistaRTMGDR
    6.0.6000.20xxxWindows VistaRTMLDR
    6.0.6001.18xxxWindows Vista SP1 and Windows Server 2008 SP1SP1GDR
    6.0.6001.22xxxWindows Vista SP1 and Windows Server 2008 SP1SP1LDR
  • Service Pack 1 is integrated into Windows Server 2008.
  • The .manifest files and the .mum files that are installed in each environment are listed separately in the "Additional file information for Windows Server 2008 and for Windows Vista" section. These files and their associated .cat (security catalog) files are critical to maintaining the state of the updated component. The .cat files are signed with a Microsoft digital signature. The attributes of these security files are not listed.
For all supported x86-based versions of Windows Server 2008 and Windows Vista
File nameFile versionFile sizeDateTimePlatform
Usb.infNot Applicable40,74022-Jan-200900:47Not Applicable
Usbd.sys6.0.6001.223585,88822-Jan-200903:25Not Applicable
Usbport.infNot Applicable59,86822-Jan-200900:47Not Applicable
For all supported x64-based versions of Windows Server 2008 and Windows Vista
File nameFile versionFile sizeDateTimePlatform
Usb.infNot Applicable41,06022-Jan-200901:01Not Applicable
Usbport.infNot Applicable59,99622-Jan-200901:01Not Applicable
For all supported Itanium-based versions of Windows Server 2008
File nameFile versionFile sizeDateTimePlatform
Usb.infNot Applicable40,90021-Jan-200923:40Not Applicable
Usbd.sys6.0.6001.2235811,64822-Jan-200902:41Not Applicable
Usbport.infNot Applicable59,93221-Jan-200923:40Not Applicable
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates

Additional file information for Windows Server 2008

Additional files for all supported x86-based versions of Windows Server 2008 and Windows Vista

File nameFile versionFile sizeDateTimePlatform
Package_for_kb963655_client_1~31bf3856ad364e35~x86~~ Applicable1,36722-Jan-200916:18Not Applicable
Package_for_kb963655_client~31bf3856ad364e35~x86~~ Applicable1,43122-Jan-200916:18Not Applicable
Package_for_kb963655_sc_0~31bf3856ad364e35~x86~~ Applicable1,42122-Jan-200916:18Not Applicable
Package_for_kb963655_sc~31bf3856ad364e35~x86~~ Applicable1,42322-Jan-200916:18Not Applicable
Package_for_kb963655_server_0~31bf3856ad364e35~x86~~ Applicable1,42522-Jan-200916:18Not Applicable
Package_for_kb963655_server~31bf3856ad364e35~x86~~ Applicable1,43122-Jan-200916:18Not Applicable
Package_for_kb963655_winpesrv_0~31bf3856ad364e35~x86~~ Applicable1,42222-Jan-200916:18Not Applicable
Package_for_kb963655_winpesrv~31bf3856ad364e35~x86~~ Applicable1,42922-Jan-200916:18Not Applicable
X86_usb.inf_31bf3856ad364e35_6.0.6001.22358_none_cb53fa4127b143f4.manifestNot Applicable2,64422-Jan-200916:20Not Applicable
X86_usbport.inf_31bf3856ad364e35_6.0.6001.22358_none_be1df2be1ccc91db.manifestNot Applicable6,73422-Jan-200916:20Not Applicable

Additional files for all supported x64-based versions of Windows Server 2008 and Windows Vista

File nameFile versionFile sizeDateTimePlatform
Amd64_usb.inf_31bf3856ad364e35_6.0.6001.22358_none_277295c4e00eb52a.manifestNot Applicable2,64622-Jan-200916:23Not Applicable
Amd64_usbport.inf_31bf3856ad364e35_6.0.6001.22358_none_1a3c8e41d52a0311.manifestNot Applicable6,73622-Jan-200916:23Not Applicable
Package_for_kb963655_client_1~31bf3856ad364e35~amd64~~ Applicable1,37522-Jan-200916:18Not Applicable
Package_for_kb963655_client~31bf3856ad364e35~amd64~~ Applicable1,43922-Jan-200916:18Not Applicable
Package_for_kb963655_sc_0~31bf3856ad364e35~amd64~~ Applicable1,42922-Jan-200916:18Not Applicable
Package_for_kb963655_sc~31bf3856ad364e35~amd64~~ Applicable1,43122-Jan-200916:18Not Applicable
Package_for_kb963655_server_0~31bf3856ad364e35~amd64~~ Applicable1,43322-Jan-200916:18Not Applicable
Package_for_kb963655_server~31bf3856ad364e35~amd64~~ Applicable1,43922-Jan-200916:18Not Applicable
Package_for_kb963655_winpesrv_0~31bf3856ad364e35~amd64~~ Applicable1,43022-Jan-200916:18Not Applicable
Package_for_kb963655_winpesrv~31bf3856ad364e35~amd64~~ Applicable1,43722-Jan-200916:18Not Applicable

Additional files for all supported Itanium-based versions of Windows Server 2008

File nameFile versionFile sizeDateTimePlatform
Ia64_usb.inf_31bf3856ad364e35_6.0.6001.22358_none_cb559e3727af4cf0.manifestNot Applicable2,64522-Jan-200916:18Not Applicable
Ia64_usbport.inf_31bf3856ad364e35_6.0.6001.22358_none_be1f96b41cca9ad7.manifestNot Applicable6,73522-Jan-200916:18Not Applicable
Package_for_kb963655_sc_0~31bf3856ad364e35~ia64~~ Applicable1,42522-Jan-200916:18Not Applicable
Package_for_kb963655_sc~31bf3856ad364e35~ia64~~ Applicable1,42622-Jan-200916:18Not Applicable
Package_for_kb963655_server_0~31bf3856ad364e35~ia64~~ Applicable1,42922-Jan-200916:18Not Applicable
Package_for_kb963655_server~31bf3856ad364e35~ia64~~ Applicable1,43422-Jan-200916:18Not Applicable
Package_for_kb963655_winpesrv_0~31bf3856ad364e35~ia64~~ Applicable1,42622-Jan-200916:18Not Applicable
Package_for_kb963655_winpesrv~31bf3856ad364e35~ia64~~ Applicable1,43322-Jan-200916:18Not Applicable

Article ID: 963655 - Last Review: 01/16/2015 11:07:34 - Revision: 2.0

Windows Vista Service Pack 1, Windows Server 2008 Standard, Windows Server 2008 Enterprise, Windows Server 2008 Datacenter, Windows Server 2008 Datacenter without Hyper-V, Windows Server 2008 Enterprise without Hyper-V, Windows Server 2008 for Itanium-Based Systems, Windows Server 2008 Standard without Hyper-V, Windows Web Server 2008

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