DELL Latitude E6400, E6410, E6500, E6510 belong DELL Latitude series. This series is designed for portable business personnel, Dell's notebook has a wide range of products,The way that different series of notebooks enter the BIOS is not necessarily the same.

       The way the DELL Latitude notebook enters the BIOS is this way:When you start to see the DELL icon on the computer screen, immediately press the "F12" key to enter, this time you can perform the BIOS settings.

       The BIOS is the first software loaded when the personal computer starts,It holds the computer's most important basic input and output programs, self-checking programs after startup, and system startup programs. Sometimes laptops crash, blue screens or need to detect failures, we need to go into the BIOS to set up and restore the CMOS original settings.

       To restore the original CMOS settings: Press and hold the "ALT" + "F" key combination and you're done after hearing a "BI" sound.

       Other DELL series notebooks are also the same way to enter the BIOS, but if you want to restore the original CMOS settings, press the "F9" button to set it.