32-bit windows is not working (atm?), but win xp can be installed at 64bit also, its kinda rare though, I havent seen anyone try it or report that its not working...
Not sure if Pox Nora is a 64-bit client only or if its a tiny little bug somewhere that just needs a spanking and its up and running for 32-bit users. the codebase Unity supports windows XP 32-bit, so thats good news, it requires SP2 though, i really hope you have atleast SP2 when surfing on a XP computer, else you are lucky or have great firewalls https://unity3d.com/unity/system-requirements
Is there anything new about possibility pf playing poxnora on windows XP 32bit? My launcher also doesn't work it gives me error message.