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BIOS is an acronym for Basic Input or Output System, also known as System Setup. BIOS is firmware that is embedded on a small memory chip on the computer's system board or motherboard. It acts as an interface between the computer's hardware and the operating system. BIOS also contains instructions that the computer uses to perform basic instructions such as whether to boot from network or hard disk drive.
When a computer is powered on, BIOS activates all the basic hardware that is required to boot the operating system including but not limited to:
To access BIOS or System Setup on Dell computers:
Dell recommends updating the BIOS as part of your scheduled update cycle. BIOS update can often fix problems, add features, or both to the BIOS. BIOS update contains feature enhancements or changes that help keep the system software current and compatible with other system modules (hardware, firmware, drivers, and software) as well as providing security updates and increased stability.
BIOS on a computer has to be updated manually. Dell provides an easy-to-use self-installing update utility that allows this task to be performed easily.
Click to expand a section below for more information.
To access BIOS or System Setup on a Dell computer:
BIOS update for Dell computers are available for download at Dell Drivers & Downloads page.
To learn more about how to download a driver, refer to the Dell knowledge-base article, "How to download and install a device driver?"
It is important to keep the BIOS of your Dell computer up to date. New releases of BIOS can provide improvements to hardware compatibility, improved diagnostics, increased stability, and security updates.
To learn more about how to download and install a driver, refer to the Dell knowledge-base article, "How to download and install a device driver?"
If the computer cannot boot into or load the operating system but there is still a need to update the BIOS, download the BIOS file using another computer and save it to a bootable USB flash drive.
To learn how to update the system BIOS in a Linux environment such as Ubuntu, refer to the Dell knowledge-base article Updating the Dell BIOS in Linux and Ubuntu Environments.Back to top
To learn about updating BIOS on Dell computers with BitLocker enabled, refer to the Dell knowledge-base article Updating BIOS on Systems With BitLocker Enabled.
A corrupt BIOS is one of the possible causes of your computer unable to complete POST or some times even boot into the operating system. BIOS Recovery tool is software that is designed to recover a corrupted BIOS based on Boot Block Technology. The software's main feature is to provide flexibility to recover the corrupted BIOS using a BIOS recovery file from the computer's primary hard disk drive or an external USB key.
If your Dell computer or tablet supports BIOS recovery, you can recover the corrupt BIOS by using the BIOS recovery method on your Dell computer or tablet. Refer to the Dell knowledge-base article BIOS Recovery options on a Dell computer or Tablet for more information.Back to top
The information stored in the BIOS (Basic Input/Output System), known as ESCD (Extended System Configuration Data) can occasionally become corrupted due to various situations such as power events, incorrect settings by the user, hardware incompatibility due to a specific setting, or a No POST or No Video scenario. In these cases, it is sometimes necessary to reset the BIOS or CMOS (Complementary metal–oxide–semiconductor) to "Factory Defaults" or in other circumstances, clear the NVRAM (Non-Volatile Random Access Memory).
To learn more about how to perform a BIOS or CMOS reset, refer to the Dell knowledge-base article How to Perform a BIOS or CMOS Reset and/or Clear the NVRAM on your Dell System.
The BIOS or UEFI firmware offers the ability to set lower-level passwords. This allows you to restrict a user from booting the computer, booting to removable USB device, and changing the BIOS or UEFI settings without permission.
There are 3 types of passwords that can be set in the BIOS or UEFI firmware settings.
To learn more about password settings in the BIOS or UEFI firmware and how to reset the passwords, see the Dell knowledgebase article How to Set, Change, or Remove a Password in BIOS or UEFI Firmware.
Article ID: SLN129956Last Date Modified: 07/21/2020 06:16 AM