Universal Serial Bus (USB) devices that are connected to a Windows 98 Second Edition-based computer may not work if both of the following hardware components are installed on the computer:

•	An AMD processor (running at 350 MHz or faster)
•	A VIA Technologies USB controller

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This problem occurs because there is a timing-specific problem in the Universal Host Controller driver (Uhcd.sys) that may prevent USB devices from being properly enumerated under specific timing conditions.

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To resolve this problem, download and then run the appropriate file for your language version of Windows.

NOTE: This update only applies to Windows 98 Second Edition. For additional information about USB devices in Windows 98, click the article number below to view the article in the Microsoft Knowledge Base:
NOTE: For additional information about troubleshooting USB problems in Windows 98, Windows 98 Second Edition and Windows Millennium Edition (Me), click the article number below to view the article in the Microsoft Knowledge Base: The following files are available for download from the Microsoft Download Center:
Release Date: October 15, 1999

For additional information about how to download Microsoft Support files, click the following article number to view the article in the Microsoft Knowledge Base: Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help to prevent any unauthorized changes to the file.

This fix should have the following file attributes or later:

Date Time Version Size File name
--------------------------------------------------
08/20/99 1:14pm 4.10.2223 30,528 Uhcd.sys 
				

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Microsoft has confirmed that this is a problem in Windows 98 Second Edition.

This problem was corrected in Windows Millennium Edition.

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For additional information about Windows 98 and Windows 98 Second Edition hotfixes, click the article number below to view the article in the Microsoft Knowledge Base:

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