USB Device causes XP system to hang on reboot
This problem may occur if you have both USB 2.0 devices and USB 1.1 FDD devices connected to a Windows XP SP1-based computer. Because Windows XP SP1 does not support the USB 2.0 Legacy BIOS, the USB 1.1 device driver does not work correctly.
To work around this problem, turn off USB 2.0 Legacy BIOS support in the computer's BIOS Setup utility. For information about using the computer Setup utility to modify the BIOS settings, contact the manufacturer of your computer.
Microsoft KB# 832577: The Computer Stops Responding During Startup
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