Hi, How can I determine which version of Windows XP 64 Bit I'm having? I haven't got the final yet so I would like to give the latest RC a try. I just want to make sure I've got the latest though. If I look at the version info of the setup.exe file I get to see version 5.1.2600.0. Is this the actual build? Which build version does RC2 have? Or is there even a later edition? If yes, which build version does that one have? What build version does the final release have?