The computer stops responding when an USB device resumes from the USB Selective Suspend state in Windows 7 or in Windows Server 2008 R2

Hotfix information

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:

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.

Prerequisites

This hotfix can be applied on computers that are running Windows 7 or Windows Server 2008 R2.

Restart requirement

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

Registry information

To use one of the hotfixes in this package, you do not have to make any changes to the registry.

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 7 and Windows Server 2008 R2 file information notes

The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are
listed separately
. MUM and MANIFEST files, and the associated security catalog (.cat) files, are critical to maintaining the state of the updated component. The security catalog files (attributes not listed) are signed with a Microsoft digital signature.

For all supported x86-based versions of Windows 7

For all supported x64-based versions of Windows 7 and of Windows Server 2008 R2

For all supported Itanium-based versions of Windows Server 2008 R2

After you apply this hotfix, the issue described in the "Symptoms" section will not occur. However, the following issues may occur:

1. An attached USB device resumes from the USB Selective Suspend state when the computer is running. Then, Windows may report that the USB device is disconnected from the computer, or that the USB device is reconnected to the computer. Additionally, the affected USB device is unresponsive for several seconds to less than one minute.
2. When the computer tries to enter a Sleep or Hibernate state, there is no visible indication that an attached USB device is disconnected. When the computer resumes from the Sleep or Hibernate state, Windows reports that the USB device is disconnected from and reconnected to the computer.

To work around this issue, clear the Allow the computer to turn off this device to save power check box for the affected USB device or USB Root Hub:

1. Click Start, type device manager in the Start Search box, and then press ENTER.
   
   Note If you are prompted for an administrator password or confirmation, type your password and then click Continue.
2. On the View menu, click Devices by connection.
3. Expand the ACPI node, expand Microsoft ACPI-Compliant System, and then expand PCI bus.
4. Several USB universal host controllers will be listed.
5. Expand each USB universal host controller node, and then expand successive subnodes until you find the name of the USB device.
6. When you locate the affected device, right-click the device, and then click Properties.
7. If there is a Power Management tab, click the Power Management tab, and clear the Allow the computer to turn off this device to save power check box, then click OK.
8. If there is no Power Management tab, click Cancel, then double-click the associated USB Root Hub, click the Power Management tab, clear the Allow the computer to turn off this device to save power check box, then click OK.

Note You may have more than one attached USB device or USB hub. You can apply these steps to each USB device or USB Root Hub in turn to identify which one causes the issues. If the issue does not occur after you apply these steps to a particular device or USB Root Hub, then that device or USB Root Hub causes the issue.

For more information about USB Selective Suspend, visit the following Microsoft Developer Network (MSDN) Web site:For more information about System Sleeping States, visit the following Microsoft Developer Network (MSDN) Web site:

Additional file information for Windows Server 2008 R2 and for Windows 7

Additional files for all supported x86-based versions of Windows 7

Additional files for all supported x64-based versions of Windows Server 2008 R2 and of Windows 7

Additional files for all supported Itanium-based versions of Windows Server 2008 R2