I have a Compaq desktop PC, to be more specific: Compaq Presario SR2014HM. What I want to know is how does a company like Compaq build a PC (desktop, laptop, or notebook) and that PC is forever known as a Compaq. The motherboard I have is an ASUS. What part of the whole desktop PC "tells" that the PC it is a Compaq. Like whenever I restart my PC the logo that first shows says Compaq. What information storage unit does the PC read to reconize that it is a Compaq. I know that it IS NOT the HDD, because I've formatted my HDD and reinstalled my OS several times. Is it the casing? the PSU? What is it?