Please help me, i have tried so much to restore my IBM Lenovo ThinkCentre a52 Model Back to factory settings. I don't like when people just say oh I think you need to go to this menu or you need the one disc. Someone please tell me step by step how to completely restore it. I need care about nothing on it, I have a wireless router i connect it and i care about no software on it besides McAfee which i can put back on it. Of course i'll still need Windows XP but no files, or pictures are needed at all and I want them all off anyway. Someone please help me restore it all. Thank You!