Microsoft has released an update for the USB drivers
included in Windows XP Service Pack 1 (SP1) that addresses the
following issues:
Power Management
* You may not be able to use your USB mouse (or wake
your computer with the USB mouse) after you suspend or hibernate your
computer while you are continuously moving the USB mouse. When this
problem occurs, you can still wake your computer with the power button
without any loss of functionality. Generally, it is best practice not
to move your USB mouse until your computer has completed the suspend or
hibernate operation even after you apply this update.
* Your computer automatically restarts instead of
resuming from hibernation, or you receive a serious error (STOP
0x000000A in Usbport.sys).
* Your USB 2.0 controller does not enter the
selective suspend mode. Because of this behavior, your processor cannot
enter a C3 (Clock-Stopped) power state after you disconnect a device
from the USB 2.0 hub that is connected to a USB EHCI controller.
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