Microsoft KB Archive/312370

= Universal Serial Bus 2.0 support in Windows XP =

Article ID: 312370

Article Last Modified on 5/7/2007

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APPLIES TO


 * Microsoft Windows XP Home Edition
 * Microsoft Windows XP Professional

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This article was previously published under Q312370



SYMPTOMS
You may experience any of the following symptoms:  Your Hi-Speed Universal Serial Bus (USB) 2.0 device does not operate in Hi-Speed mode. If you plug in a Hi-Speed USB 2.0 device, you receive any of the following warnings:

The Generic USB Hub is a HI-SPEED USB device and will function at reduced speed when plugged into a non-HI-SPEED port.

HI-SPEED USB Device Plugged into non-HI-SPEED USB Hub. A HI-SPEED USB device is plugged into a non-HI-SPEED USB hub.

 An Enhanced Host Controller Interface-compliant (EHCI-compliant) USB host controller appears in Device Manager with an exclamation point in a yellow circle, or with status code 28.



CAUSE
These symptoms occur because Windows XP does not include support for EHCI host controllers.



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

322389 How to obtain the latest Windows XP service pack



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section. This problem was first corrected in Windows XP Service Pack 1.



MORE INFORMATION
For additional information about USB 2.0 support, visit the following Microsoft Web site:

http://www.microsoft.com/whdc/default.mspx

Additional query words: kbAppCompat high speed highspeed

Keywords: kbhotfixserver kbqfe kbpubtypekc kbenv kbappcompatibility kbbug kbfix kboswin2000fix kbwinxpsp1fix KB312370

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