2.3U

local label = os.getComputerLabel()

if label == "2.3" then
  print("You allready have this version " .. label)
  return
end

if label == "2.0" or label == "2.1" or label == "2.2" then
    term.clear()
    term.setCursorPos(1,1)
    print("Welcome to MineUpdater")
    print("please wait to update 2.3")
    sleep(2)
    print("removing old file")
    shell.run("delete startup.lua")
    sleep(5)
    print("installing new files")
    sleep(2)
    shell.run("pastebin get JXtz0FbD startup.lua")
    sleep(2)
    print("the update complete")
    print("please wait this will reboot")
    sleep(4)
    os.reboot()
end

print("you dont have MineOS2")