The 3423 is a USB 2.0 device. Therefore I suggest a more modern PC with USB 2.0. It needs to run Windows 98SE or higher. You don't need a huge memory, but, when it comes to PC memory, always get as much as you can afford for all round performance.
USB 1.1 works fine though, but the data transfer is a lot slower so the screens don't update as fast.
THE PicoScope Automotive Authority
In North America