Restart the computer
Enter BIOS/UEFI setup during startup
Find the BIOS Version or BIOS Revision field on the main screen
In Windows, open System Information and check BIOS Version/Date
In Windows, open Command Prompt and run `wmic bios get smbiosbiosversion`
In Windows, open PowerShell and run `Get-CimInstance Win32_BIOS | Select-Object SMBIOSBIOSVersion`
In macOS, click the Apple menu, select About This Mac, and check the system report for firmware version
In Linux, run `sudo dmidecode -s bios-version`
In Linux, check `/sys/class/dmi/id/bios_version`