When you wake a Windows Vista-based computer from sleep or from hibernation, you receive a "Stop 0x44" error message in the Usbhub.sys process. This error message resembles the following:

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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:

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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 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.

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	6.0.6000.20508	8,704	05-Jan-2007	15:06	x86
Update.mum	Not Applicable	2,716	06-Jan-2007	02:55	Not applicable
Usbccgp.sys	6.0.6000.20508	73,216	05-Jan-2007	12:51	x86
Usbd.sys	6.0.6000.20508	5,888	05-Jan-2007	12:50	Not applicable
Usbehci.sys	6.0.6000.20508	38,400	05-Jan-2007	12:50	x86
Usbhub.sys	6.0.6000.20508	191,488	05-Jan-2007	12:51	x86
Usbhub.sys	6.0.6000.20508	191,488	05-Jan-2007	12:51	x86
Usbohci.sys	6.0.6000.20508	19,456	05-Jan-2007	12:50	x86
Usbport.sys	6.0.6000.20508	223,744	05-Jan-2007	12:51	x86
Usbuhci.sys	6.0.6000.20508	22,528	05-Jan-2007	12:50	x86
X86_usb.inf_31bf3856ad364e35_6.0.6000.20508_none_c9a3c39f2a6232b2.manifest	Not applicable	2,356	06-Jan-2007	02:57	Not applicable
X86_usbport.inf_31bf3856ad364e35_6.0.6000.20508_none_bc6dbc1c1f7d8099.manifest	Not applicable	5,386	06-Jan-2007	02:57	Not applicable

Windows Vista, 64-bit versions

File name	File version	File size	Date	Time	Platform
Amd64_usb.inf_31bf3856ad364e35_6.0.6000.20508_none_25c25f22e2bfa3e8.manifest	Not applicable	2,358	06-Jan-2007	03:00	Not applicable
Amd64_usbport.inf_31bf3856ad364e35_6.0.6000.20508_none_188c579fd7daf1cf.manifest	Not applicable	5,388	06-Jan-2007	03:00	Not applicable
Hccoin.dll	6.0.6000.20508	10,752	05-Jan-2007	15:40	x64
Update.mum	Not applicable	2,716	06-Jan-2007	02:55	Not applicable
Usbccgp.sys	6.0.6000.20508	95,232	05-Jan-2007	13:11	x64
Usbd.sys	6.0.6000.20508	7,552	05-Jan-2007	13:11	x64
Usbehci.sys	6.0.6000.20508	48,128	05-Jan-2007	13:11	x64
Usbhub.sys	6.0.6000.20508	266,240	05-Jan-2007	13:11	x64
Usbhub.sys	6.0.6000.20508	266,240	05-Jan-2007	13:11	x64
Usbohci.sys	6.0.6000.20508	24,064	05-Jan-2007	13:11	x64
Usbport.sys	6.0.6000.20508	257,024	05-Jan-2007	13:11	x64
Usbuhci.sys	6.0.6000.20508	28,672	05-Jan-2007	13:11	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. This problem was first corrected in Windows Vista Service Pack 1.

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For more information about how hotfix packages are named, click the following article number to view the article in the Microsoft Knowledge Base: For more information, click the following article number to view the article in the Microsoft Knowledge Base:

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