In general, install Windows using the newer UEFI mode, as it includes more security features than the legacy BIOS mode. If you're booting from a network that only supports BIOS, you'll need to boot to legacy BIOS mode.Power on system. Press F2 when prompted to enter BIOS menu. Navigate to Boot -> Boot Order. Select the desired mode: UEFI or Legacy.If you select Legacy BIOS Boot Mode, only boot candidates that support Legacy BIOS Boot Mode are listed in the boot order list. Note – If you change the boot mode, the installed operating system is unable to boot. Also the boot candidates from the previous boot mode disappear.

Does legacy boot affect performance : Slower Boot Times: Legacy BIOS typically has slower boot times than UEFI, especially on systems with large storage devices. Limited Hardware Support: Legacy BIOS may not fully support newer hardware components, such as larger hard drives, SSDs, or advanced peripherals.

Is BIOS mode Legacy good

Legacy BIOS is the old mode that uses a 16-bit code and a limited number of options. Some older hardware and software may not be compatible with UEFI, so legacy BIOS is still available as a fallback option. If you're more familiar with BIOS, then my recommendation is to use that.

Is UEFI more secure than BIOS : UEFI provides enhanced security features compared to BIOS. It supports secure boot, which ensures that only authorized operating systems and firmware are loaded during the boot process. It also includes a more secure method for handling the master boot record.

UEFI provides a more powerful, flexible, and secure boot environment. The UEFI boot mode has advantages over the Legacy BIOS boot mode. Legacy BIOS uses the Master Boot Record (MBR) partitioning scheme and supports hard disks that are up to 2 TB in size.

Whilst UEFI might sound like the clear winner, there is a time when Legacy BIOS is needed. If you are using an old operating system or old hardware, then UEFI isn't compatible with your PC. Therefore, you'll need to use Legacy BIOS.

Should I disable Legacy in BIOS

Legacy BIOS is the old mode that uses a 16-bit code and a limited number of options. Some older hardware and software may not be compatible with UEFI, so legacy BIOS is still available as a fallback option. If you're more familiar with BIOS, then my recommendation is to use that.Re: [dual boot] windows in legacy mode

If you have correctly installed LM, also in BIOS mode, you should see an OS selection menu after the reboot. If you don't see it – either you have damaged some system during the "repair", or LM is installed in UEFI mode and you will have to reinstall only it in BIOS mode.When installing Windows*, the partition style used will determine if UEFI mode or legacy BIOS mode is supported. UEFI mode is compatible with the GUID Partition Table (GPT) partition style, while the legacy BIOS mode is compatible with the Master Boot Record (MBR) partition style.

Boot Speed: UEFI generally boots faster than BIOS, allowing for quicker system startup and reduced waiting times. Customizability: UEFI allows for more customization options, enabling users to personalize settings and optimize system performance to a greater extent than BIOS.

Is GPT UEFI or legacy : When installing Windows*, the partition style used will determine if UEFI mode or legacy BIOS mode is supported. UEFI mode is compatible with the GUID Partition Table (GPT) partition style, while the legacy BIOS mode is compatible with the Master Boot Record (MBR) partition style.

Is UEFI mode safe : You say that your Windows is installed in UEFI Mode, so it will not harm anything. Just that once you switch your Firmware option to UEFI, no more Legacy Boot would be allowed and if there was any OS installed in CSM mode, it will not boot.

Why is UEFI replacing BIOS

UEFI firmware provides several technical advantages over a BIOS: Ability to boot a disk containing large partitions (over 2 TB) with a GUID Partition Table (GPT) Flexible pre-OS environment, including network capability, GUI, multi language.

Thus, UEFI is a crucial firmware interface that provides a standardized and extensible framework for firmware development, enabling improved performance, support for larger storage devices, and enhanced security features.If your BIOS Mode is set to Legacy, you need to check if your OS Drive is formatted as MBR or GPT. If it is MBR, you will need to convert it to GPT before setting your BIOS Mode to UEFI. Please see this video for information on how to check your drive, and this video on converting your drive to GPT.

Is Legacy slower than UEFI : UEFI (Unified Extensible Firmware Interface) is a newer standard that replaces the legacy BIOS. UEFI offers more features and benefits, such as faster boot times, better security, larger disk support, and graphical user interface.