I have some legacy hardware (amateur radio) as well as some software. I ordered a refabbed Dell Optiflx 520 computer. It works as advertised. However, the radio doesn't have all the features that are available. Upon examination radio software needs to updated, and new drivers installed. The first words in the new software "it won't work with XP64" I've already ordered XP32. My question is my computer doesn't have the "round plug type mouse and keyboard connectors". There is a notice on the software that states USB keyboard and mouse may not be operable. I have one serial port, and 8 USB ports. I have a keyboard and mouse of this vintage, is there a serial port adapter I can use?