Windows Vista And Widows Xp

hi .please i just got a laptop from the uk and its a vista,infact i got 2 and sold one out and the guy who bought it has more IT knowledge and he has gone to convert it to windows xp.he says that vista is too complecated to use in nigeria that its a new technology.
please i do not know if to believe him or should use the vista.what are the main issues with the two?
its an HP G7045EA

yes, thats correct, VISTA is new, few problems yet, if you are in Nigeria go with XP as that will support most things you plan to buy and plug unto your Laptop, you might not get the correct drivers for pheripheras you may obtain from nigeria OK, and did this Laptop come pre-installed with Vista? if so you can't downgrade it,No backward compactibility.