How to Check Your Computer BIOS Version on Windows and Linux

The Importance of Knowing Your System BIOS Version

When discussing computer maintenance, the BIOS (Basic Input/Output System) or its modern successor, UEFI (Unified Extensible Firmware Interface), sits at the top of the software hierarchy. It is firmware—low-level software burned onto a chip on the motherboard—responsible for waking up physical components and preparing the stage for the operating system to load. Knowing which version is installed on your equipment is not just technical curiosity, but a fundamental requirement before performing any security updates, fixing stability bugs, or installing new processors.

In practice, this means dropping a newer CPU into an older motherboard might require a prior BIOS update so the hardware is recognized correctly. If you skip this verification, the computer will simply refuse to display a video signal or freeze on the splash screen. Therefore, mastering methods to extract this information safely is an indispensable skill for both support technicians and enthusiasts building their own rigs at home.

Checking the Version on Windows Without Hassle

If your computer runs the Windows operating system, native tools are built specifically to save you time and avoid unnecessary reboots. The simplest and most direct way for any user is to utilize the System Information utility. To open it, simply press the Windows + R keys on your keyboard to open the Run window, type the command msinfo32, and press Enter. A comprehensive window will open listing hardware and software details.

On this system summary screen, look for the item called BIOS Version/Date. The text displayed there will reveal the manufacturer, the numerical sequence of the current version, and the date that software was compiled at the factory. This information is usually accompanied by the BIOS Mode term, which indicates whether your computer uses the modern UEFI standard or the older legacy technology—a crucial detail if you plan to format the hard drive or alter boot partitions.

Extracting Detailed Data via Command Line

For those who prefer the agility of the terminal or need to automate checks across multiple computers in a corporate network, Windows offers PowerShell and the Command Prompt. PowerShell, an advanced command-line interpreter for system administrators, allows you to extract structured data cleanly. Just open the start menu, type PowerShell, and run the command Get-WmiObject win32_bios or the modern equivalent Get-CimInstance Win32_BIOS.

Running this command displays properties such as the serial number, manufacturer, and exact firmware version in the console. The major advantage of this approach is the ability to export this data to a text file or spreadsheet, facilitating IT asset inventories. It is the same logic used by automated inventory software, but executed natively without installing third-party applications that often bundle unwanted software toolbars.

Checking BIOS on Linux Through the Terminal

Linux operating system users have access to extremely powerful tools integrated into the kernel for auditing hardware. The standard utility for this task is dmidecode, which reads the system's DMI (Desktop Management Interface) table to expose physical machine components in detail. Since this operation deals with sensitive hardware information, the command must be executed with superuser privileges.

In practice, open your favorite terminal and type sudo dmidecode -s bios-version to directly obtain the current version number. If you want a complete report including release date and manufacturer, simply run sudo dmidecode -t bios. This approach works on virtually any Linux distribution, whether Ubuntu, Fedora, Debian, or Arch, making it the gold standard for remote servers where no graphical interface is available.

Direct Access to the BIOS Panel During Boot

When the operating system fails to boot or you are building a freshly purchased machine with no OS installed, the only way to discover the BIOS version is by consulting the firmware configuration panel itself. To access this screen, you must restart the computer and repeatedly press a specific key during the first few seconds of the black screen, before the Windows or Linux logo appears.

The most common keys vary according to the motherboard manufacturer, with Del (Delete) and F2 being the predominant choices on the vast majority of modern desktops and laptops. Specific brands also use keys like F1, F10, or Esc. As soon as the graphical BIOS menu opens, look for tabs like Main, Advanced, System Information, or Boot. The version number will be clearly visible, allowing you to note the data with surgical precision before proceeding with any intervention.

Final Considerations on Firmware Maintenance

Correctly identifying the BIOS version is the first step in an indispensable security protocol for the longevity and stability of your computer. We have seen that native Windows tools and direct Linux commands resolve the problem in seconds, eliminating guesswork and unnecessary operational risks. Keeping firmware updated ensures compatibility with new technologies and fixes critical hardware-level security flaws, consolidating a solid foundation for the entire system's operation.

Therefore, before downloading update files from your motherboard manufacturer's website, always confirm the exact revision currently running on the machine. A mistake at this stage can corrupt the boot chip and turn your computer into a useless paperweight. With the methods presented, you now possess the technical autonomy necessary to audit your hardware safely and accurately.