A USB Device May Not Work on a Computer That Has Multiple Processors

View products that this article applies to.

This article was previously published under Q306788

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SYMPTOMS

When you use a USB device under the following conditions, the USB device may stop responding and you may need to restart your computer:

If the USB device has multiple ports

-and-
If you are using the USB device to perform bulk transfers (bulk read or write transfers)

-and-
If the computer has multiple processors

-and-
If the computer is running Windows 2000

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CAUSE

This problem occurs because there is an issue with the code for the Uhcd.sys driver.

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RESOLUTION

To resolve this problem, obtain the latest service pack for Windows 2000. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

260910 (http://support.microsoft.com/kb/260910/EN-US/ ) How to Obtain the Latest Windows 2000 Service Pack

The English-language version of this fix should have the following file attributes or later:

   Date         Time   Version        Size    File name
   ----------------------------------------------------
   11-Jan-2002  15:40  5.0.2195.4828  32,560  Uhcd.sys

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STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was first corrected in Windows 2000 Service Pack 3.

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MORE INFORMATION

For additional information about how to obtain a hotfix for Windows 2000 Datacenter Server, click the article number below to view the article in the Microsoft Knowledge Base:

265173 (http://support.microsoft.com/kb/265173/EN-US/ ) The Datacenter Program and Windows 2000 Datacenter Server Product

For additional information about how to install multiple hotfixes with only one reboot, click the article number below to view the article in the Microsoft Knowledge Base:

296861 (http://support.microsoft.com/kb/296861/EN-US/ ) Use QChain.exe to Install Multiple Hotfixes with One Reboot

For additional information about how to install Windows 2000 and Windows 2000 hotfixes at the same time, click the article number below to view the article in the Microsoft Knowledge Base:

249149 (http://support.microsoft.com/kb/249149/EN-US/ ) Installing Microsoft Windows 2000 and Windows 2000 Hotfixes

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