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

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