Open Software Solutions

On a Windows Vista-based computer that uses certain ATI chipsets, you do not receive notification when the USB bus is overloaded. For example, you do not receive notification if the sum of the power requirements for the connected USB devices is more than the available power that the USB bus provides.

Note If you have too many USB devices connected to the USB bus, one or more of these USB devices may not work.

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Hotfix information

A supported hotfix is now 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 service pack that contains this hotfix.

To resolve this problem, submit a request to Microsoft Online Customer Services to obtain the hotfix. To submit an online request to obtain the hotfix, visit the following Microsoft Web site:

Note If additional issues occur or 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. To create a separate service request, visit the following Microsoft Web site:

Prerequisites

No prerequisites are required.

Restart requirement

You must 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, x86-based versions

File name	File version	File size	Date	Time	Platform
Hccoin.dll	6.0.6000.20622	8,704	19-Jun-2007	02:04	x86
Update.mum	Not Applicable	2,717	19-Jun-2007	13:43	Not Applicable
Usbd.sys	6.0.6000.20622	5,888	19-Jun-2007	01:15	Not Applicable
Usbehci.sys	6.0.6000.20622	38,400	19-Jun-2007	01:15	x86
Usbhub.sys	6.0.6000.20622	193,536	19-Jun-2007	01:15	x86
Usbohci.sys	6.0.6000.20622	19,456	19-Jun-2007	01:15	x86
Usbport.sys	6.0.6000.20622	224,768	19-Jun-2007	01:15	x86
Usbuhci.sys	6.0.6000.20622	23,040	19-Jun-2007	01:15	x86
X86_usb.inf_31bf3856ad364e35_6.0.6000.20622_none_c98823f12a77cfb1.manifest	Not Applicable	2,356	19-Jun-2007	13:44	Not Applicable
X86_usbport.inf_31bf3856ad364e35_6.0.6000.20622_none_bc521c6e1f931d98.manifest	Not Applicable	5,386	19-Jun-2007	13:44	Not Applicable
Usbccgp.sys	6.0.6000.20622	73,216	19-Jun-2007	01:15	x86
Usbhub.sys	6.0.6000.20622	193,536	19-Jun-2007	01:15	x86

Windows Vista, 64-bit versions

File name	File version	File size	Date	Time	Platform
Amd64_usb.inf_31bf3856ad364e35_6.0.6000.20622_none_25a6bf74e2d540e7.manifest	Not Applicable	2,358	19-Jun-2007	13:47	Not Applicable
Amd64_usbport.inf_31bf3856ad364e35_6.0.6000.20622_none_1870b7f1d7f08ece.manifest	Not Applicable	5,388	19-Jun-2007	13:47	Not Applicable
Hccoin.dll	6.0.6000.20622	10,752	19-Jun-2007	03:13	x64
Update.mum	Not Applicable	2,717	19-Jun-2007	13:43	Not Applicable
Usbd.sys	6.0.6000.20622	7,552	19-Jun-2007	01:44	x64
Usbehci.sys	6.0.6000.20622	48,128	19-Jun-2007	01:45	x64
Usbhub.sys	6.0.6000.20622	268,288	19-Jun-2007	01:45	x64
Usbohci.sys	6.0.6000.20622	24,064	19-Jun-2007	01:45	x64
Usbport.sys	6.0.6000.20622	258,048	19-Jun-2007	01:45	x64
Usbuhci.sys	6.0.6000.20622	28,672	19-Jun-2007	01:45	x64
Usbccgp.sys	6.0.6000.20622	95,744	19-Jun-2007	01:45	x64
Usbhub.sys	6.0.6000.20622	268,288	19-Jun-2007	01:45	x64

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Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the Applies to section.

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For more information, click the following article number to view the article in the Microsoft Knowledge Base:

The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.

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