If you want to know more about something, you also need to provide accurate information about your computer.
If you have bought this computer from someone and you think someone has changed the BIOS settings, there is always a "Restore Default Settings" option.
NB! Don't forgot to click F10, otherwise your changes will not be saved.
PS. If You don't know what these settings exactly do, don't make any changes. Let still the professionals do it.