Updating bios windows
The BIOS interface is designed for advanced users, you can change a setting that could prevent your computer from starting correctly and you could suffer potential loss of data.
Dell recommends updating the BIOS as part of your scheduled update cycle.
Each new bios version should have a brief description of what the update covers.
You should look them over and decide which one best suits your needs, such as newer memory or CPU compatibility or even just new enhancements.
Periodically you may need to update (flash) the bios to add new functionality, such as compatibility with a new CPU or Ram.
Adding a new hard drive , video card and DVD drive will also show up in the bios and checking it to see if the device registered with the bios is a way to confirm it's compatible. It is not necessary to update the bios simply because a newer one is available, you should only update the bios if there is a need to do so.
If you did the update in the bios you will need to save and exit the bios and then on the restart go back into the bios to reset and changes that you had previously.
From the motherboards manufacturers site you will need to locate the model of your motherboard and after entering the OS version you will see a section like drivers and downloads and there should be a listing for motherboard utilities and drivers along with bios versions. Find your bios version on the list and see what other versions are above it (newer) and going by the number and date of release you can see if there is one or many newer ones.
BIOS is also used to identify and configure hardware components in a computer such as the hard drive, floppy drive, optical drive, CPU, memory, Plug and Play devices etc.