Controlling USB input

I need a method to delay input of a USB port during unassisted computer startup. My weather station data is a continious line feed, and when the computer restarts due to power failure, ETC, the computer sees the input and thinks the port is a "Track Ball" pointing device which locks the compute开发者_如何学Pythonr up displaying random pointers over entire screen.

Any one having any idea about this??

Fred

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Is the USB Device set in the BIOS to attempt to boot from? You can adjust the boot sequence from within your BIOS settings.