单项选择题
When rebooting a computer running Windows XP Home， a technician observes an error message stating，“illegal I/O port address.” Which of the following can be done to resolve this error？（）
A.Upgrade the motherboard BIOS.
B.Upgrade to Windows XP Professional.
C.Upgrade the CPU on the motherboard.
D.Return to Windows 2000 Professional.
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