Detection of UEFI mode in PowerShell

• Start by opening the PowerShell console. You can do this by searching for « PowerShell » in the Start menu or by pressing Win + X and selecting Windows PowerShell from the menu.
• Type in the following command:

$env:firmware_type

After pressing Enter, the console will return either UEFI or Legacy, indicating the boot mode of the system.

• UEFI: If the returned value is UEFI, it means your system is using the modern boot method, which offers faster boot times and additional security features.
• Legacy: If the result is Legacy, your system is using the traditional BIOS boot method.