If you are a gamer you are probably already running a more recent operating system. However if you are still stuck on Windows Xp or Windows Vista, you should know that Blizzard will drop support for these two old OSes. Although Windows XP is 8 years old, this OS still holds a fairly substantial amount of market share. Later this year, World of Warcraft, Diablo III, StarCraft 2, Hearthstone and Heroes of the Storm will no longer be supported. Warcraft 3 or Diablo II should still work on XP and Vista.