Tim, I used a USB to Serial cable from amazon *https://www.amazon.com/OIKWAN-Converter-Chipset-Cashier-Register/dp/B0BKJKYCJK?s=electronics&th=1

I used it on an old Windows 7 32bit computer. I have used it on a Windows 10 64bit machine and it worked on it as well.
Your mileage may differ, but it worked for me. I have lots of connection issues, but Serial isn't one of them!
Good luck