While the requirement to upgrade a Windows 10 device to Windows 11 is only that the PC be Secure Boot capable by having UEFI/BIOS enabled, you may also consider enabling or turning Secure Boot on for better security.
Does Windows 11 really need Secure Boot?
As part of the system requirements, alongside a Trusted Platform Module (TPM), a device must have “Secure Boot” enabled to install Windows 11.
How do I install Windows 11 on a non UEFI system?
wim file from the Windows 11 ISO image to the Windows 10 USB drive. Once your USB drive has booted, you’ll see the option to select and install a Windows 11 version. It’ll also pass the security checks without enabling ‘Secure Boot’ or ‘UEFI’ in BIOS.
Can I install Windows 11 on MBR?
That means you can not have MBR as the primary disk for Windows 11. Unfortunately, Microsoft has set GPT (GUID Partition Table) configuration UEFI, and secure boot enables running and installing Windows 11. Therefore, you need to have GPT as your OS disk type to install Windows 11.
Can I install Windows without UEFI?
You can install Windows 10 without UEFI in Legacy/BIOS so no, it isn’t necessary. You couldn’t install it via the USB drive with UEFI enabled because your USB is formatted as NTFS.
