I can confirm that this USB serial converter (dongle) works in WinXP:
https://manhattanproducts.us/products/manhattan-en-usb-to-serial-converter-205153
I got mine at my local Microcenter store for $22.
Curious, though, there are several drivers available on Manhattan's web site. When I had Virtual XP running under Win10 the driver that came on the included CD worked to connect to the Tech 2. However, that one didn't work on a laptop running XP natively; I had to use one of the ones on the Manhattan support site.
https://manhattanproducts.us/products/manhattan-en-usb-to-serial-converter-205153

I got mine at my local Microcenter store for $22.
Curious, though, there are several drivers available on Manhattan's web site. When I had Virtual XP running under Win10 the driver that came on the included CD worked to connect to the Tech 2. However, that one didn't work on a laptop running XP natively; I had to use one of the ones on the Manhattan support site.