I want to replace my motherboard so that i can get a PCI express slot but i was told by someone that my OS will be locked to the BIOS of the pc so if i replace the motherboard i lose the OS :( Is this likely to happen? If so how can i ask dell for a Home instillation CD? because i did not receive one with my PC, technically i have paid for the OS with my PC so surely i should be allowed the installation CD??? Where will i get the instillation Code from????