Windows XP sound on Xbox?

[SandwichSlayer]

I remember somewhere hearing a slightly modified version of the Windows XP startup sound in a Xbox (original) startup video. I think it was fake because the original Xbox is based on a modified Windows 2000 OS. It might be a weird emulator, but it also might be a later release, and if that's the case then this is just a cool little tidbit. But if this was in on release, we have some cool development stuff on our hands.