That's actually a bit of a tough one... all my operational Windows systems have 64-bit Windows 7. I might have a license for XP floating around, though. I'd have to dig around to find it and then set up a system to run it on.

For the moment I was able to program it using the Baofeng software (I used the radio at an event this weekend).

I'll see what I can do about 32-bit Windows but it'll be a week or so before I can get to it.