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When you start a Windows Vista-based computer, or when you wake the computer from sleep, a USB-connected device may not be recognized correctly. Because of this problem, you may experience any of the following issues:
A USB-based fingerprint reader may be unavailable for use at the Welcome screen. Therefore, you cannot log on to the computer by using the fingerprint reader.
A USB-based keyboard may be unavailable for use.
A USB-based mouse may be unavailable for use. The mouse pointer does not appear.
Note A wireless keyboard or a wireless mouse may communicate with a wireless receiver that is connected to a USB port.
A USB-based near field communication device (FeliCa) cannot be resumes from an S3 Sleep State (Standby).
This problem may occur only occasionally.
Note Certain USB devices may be integrated into the system, and they may be connected to an internal hub. For example, a portable computer may have a single USB bus. In this situation, the computer may use an internal USB hub to make two or more USB ports available on the computer.
Service pack information
To resolve this problem, obtain the latest service pack for Windows Vista. 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
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 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:
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.
No prerequisites are required.
You must restart your computer after you apply this hotfix.
Hotfix replacement information
This hotfix does not replace a previously released hotfix.
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.