Hello, i bought an upgraded macbook pro off of ebay. it was brand new and unregistered. Now that I am running heavier programs it seems like my computer may be slower than it should be. 2.53ghz and 8gb 1067 hmz ddr3 running after effects (utilizing both cpu and 7.5 ghz ram) Is there any way to verify that "about this mac" is true and unmodified? any thoughts or advice would be greatly appreciated.