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Want to know more about System BIOS and how to Check and Update the BIOS on your Dell System? This article shows you how.
Note: For information regarding Resetting or Clearing your system BIOS, please see the KB article:
What is the System BIOS?
Why Should You Update the System BIOS?
Check Your System BIOS Version
How to Update Your System BIOS Within Windows
Flashing the BIOS from the F12 One-Time boot menu
Updating BIOS on Systems With BitLocker Enabled
How to Update Your System BIOS Using a USB Flash Drive
Updating the Dell BIOS in Linux and Ubuntu Environments
Useful Links
BIOS is an acronym that stands for Basic Input Output S ystem. Also known as “System Setup,” the BIOS is embedded software on a small memory chip on the computer motherboard. This chip is referred to as the Complementary Metal Oxide Semiconductor (CMOS). It acts as an interface between the computer hardware and operating system, allowing the software to control the hardware.
The BIOS contains instructions that the computer uses to perform basic instructions, such booting from a network or hard drive, or which drive to boot from.
BIOS is also used to identify and configure hardware components in a computer. These include the hard drive, floppy drive, optical drive, processor, memory, and Plug-and-Play devices. This is called the ESCD (Extended System Configuration Data), and is stored in additional nonvolatile memory known as Non-Volatile Random Access Memory (NVRAM).
Over the years as technology has changed people still refer to the BIOS as both CMOS and NVRAM, however they are subtly different. The CMOS contains the BIOS and its settings, the NVRAM contains the ESCD, thus updating the BIOS does not clear the NVRAM.
You can enter the system BIOS or Setup on a Dell PC by pressing F2 at the Dell loading screen. (Figure 1)
Figure 1: BIOS Loading Screen
Or by pressing F12 and selecting BIOS Setup from the menu. (Figure 2)
Figure 2: One Time Boot Menu
Here is an example of what the BIOS system setup screen looks like: (Figure 3)
Figure 3: OptiPlex 990 BIOS Screen
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Dell recommends updating the BIOS as part of your scheduled update cycle. Like operating system and driver revisions, a BIOS update contains feature enhancements or changes that help keep your system software current and compatible with other system modules (hardware, firmware, drivers, and software) as well as providing security updates and increased stability.
Unlike Windows and anti-virus program updates which are automatic, BIOS has to be updated manually.
Dell provides an easy-to-use self-installing update package.
Caution: Always back up your data before attempting to update the BIOS as an error can result in a potential loss of data.
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There are several ways to check your BIOS version but the easiest is to use System Information.
On Windows 10 type msinfo32 into Search and press Return
Once the System Information window opens, make sure System Summary is highlighted in the left navigation window, and look for BIOS Version/Date in the right summary window (Figure 4).
Figure 4: System Information
You can also check the BIOS version from the command prompt.
If the User Access Control window appears, select Yes
In the Command Prompt window, at the C: prompt, type systeminfo and press Enter, locate the BIOS version in the results (Figure 5)
Figure 5: Command-line systeminfo
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It is important to keep your System BIOS up to date. Newer releases of BIOS can provide improvements to Hardware compatibility, improved Diagnostics, and Security updates and Increased stability.
Once you have established that you require a BIOS update, you can download the newer version from the Dell support page www.dell.com/drivers.
The video below provides a visual guide on how to Update your system BIOS.
Video (English Only)- Update your System Setup (BIOS) (2:07)
Note: When updating the BIOS on a Laptop or Portable, the battery must be present and the AC adapter plugged in.
Open a web browser (Internet Explorer, Firefox, Chrome, or Edge) and go to chúng tôi
If you are asked to ” Identify your product,” then either enter your Service tag, or select ” Browse for a product” to select manually.
Save the file to your Desktop
Follow the on-screen instructions to complete the installation (Figure 6). This reboots your system and perform a BIOS update
Figure 6: BIOS Flash Update Continue Prompt
The above screen may vary depending on version and system type.
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Most Dell systems built after 2012 can be updated from the F12 One-Time Boot Menu. This process can be executed if you have a USB memory stick formatted to the FAT32 file system and the BIOS executable file that you downloaded from the Dell Support Website and copied to the root of the USB key.
For more information about this process, please see the following article:
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Caution: If BitLocker is not suspended before updating the BIOS, the next time you reboot the system it will not recognize the BitLocker key.
You are prompted to enter the recovery key to progress and the system asks for this on each reboot.
If the recovery key is not known, this can result in data loss or an unnecessary operating system reinstall.
For more information about this subject, please see Knowledge Article:
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If the system cannot load into Windows but there is still a need to update the BIOS, download the BIOS file using another system and save it to a bootable USB Flash Drive.
Note: You must use a bootable USB Flash drive. Refer to the following article for further details:
Download the BIOS update .exe file to another system
Copy the file e.g. chúng tôi onto the bootable USB Flash drive.
Insert the USB Flash drive into the system that requires the BIOS update.
Restart the system and press F12 when the Dell Splash logo appears to display the One Time Boot Menu.
Using arrow keys, select USB Storage Device and press Return
Run the file by typing the full filename e.g. chúng tôi and hit Return
Figure 7: DOS BIOS Update Screen
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To update the system BIOS in a Linux environment such as Ubuntu, then you can get some help by following the link below:
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The following articles cover other topics that are related to BIOS which you may find useful depending on the task you are undertaking/information you need.
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If you require further assistance, please contact Technical Support.
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Last Published Date
05 Dec 2020
Version
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Article Type
Solution
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