Hi guys! I'm new in this forum; I'm italian and my english is very bad, so, please, answer me by a really basic language! xD I remember which with Windows XP for install it legally using the Key, which is located on the sticker pasted on the PC, need a OEM Windows XP copy (with the retail version that key wasn't approved). To do the same thing, with Windows 8, I need a OEM Windows 8 copy? Where I can find it (Core & Pro, x86 & x64)?