When the BIOS changes to default settings??? Will it change back to default after changing processor??? Will it change back to default when I will change motherboard???? Or it will set back to default when I change hard drive?
As cklaubur is pointing out, the BIOS settings are stored on a chip that is a part of every motherboard, and the settings are retained in that chip's memory by a small, replaceable (normally), button-cell battery. Wherever the motherboard goes, so go your BIOS settings. If you install a new motherboard into your computer, it will have it's own BIOS settings that you will want to ensure are correct when you go to configure the system.