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ITsVISTA KB-Link: KB972485

USB 2.0 high-speed devices are recognized as full-speed after you hibernate and then resume a computer that is running Windows Vista or Windows Server 2008

Assume you connect a high-speed USB 2.0 device to a computer that is running Windows Vista or Windows Server 2008. After you put the computer into hibernation and then resume the computer, the USB 2.0 device is recognized incorrectly as a full-speed device instead of a high-speed device. Therefore, the transmission speed over the USB connection is significantly reduced.

This problem occurs occasionally.

There is a download that resolves this issue. See Hotfixes for details.
32-bit Download: Contact Microsoft
64-Bit Download: Contact Microsoft

For more information on this issue, including potential causes, workarounds, and resolutions, see: Microsoft KB Article KB972485.

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