Any Way To Use Serial Port In Safe Mode ?

I have an older ibm (thinkpad 500?) Using windows 2000 that crashes randomly. I only use this computer to run an automatic key machine in my truck that uses the serial com port. The computer runs fine in safe mode, but i can't link it to the key machine because the serial port is disabled in safe mode. Is there any way to enable the serial com port in safe mode?

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