Situation: Belkin doesn’t provide F5U409 USB to Serial adapter driver for windows 7, 8, 10 and 11 64bit.
Resolution: You can checkout this blog post on how to get it working under 64bit Windows: http://www.clearchain.com/blog/posts/how-to-use-a-belkin-f5u409f5u409-cu-usb-to-pda-serial-converter-in-visawindows-7-64bit-mac-osx-10
Or search online and download U232-13.2.98.130315.exe.