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I had the same trouble with my laptop. I bought a USB to Serial adapter from Ebay that said it was pretty universal. Its from "Palm" as in Palm pilot. It didnt work with WinALDL- my laptop would absolutely not recognize a com port with it. It did come with software by the way. Then when I was about to give up I found a USB to Serial adapter at radio shack, and since they said I could return it within 30 days if it didnt work I gave it a try- and it worked! The moral of my story is some may work and some may not. Good luck finding one. BTW- I'll sell my Palm cable/software for $6 + shipping, its basically new in box. I paid $8 + shipping. Thanks
forget about serial-parallel. The most "universal" serial-USB is from Belkin, but it's pricey (about $50). The Belkin website sometimes have reconditioned ones for $23.