Choose uefi or legacy when booting from USB disk

Nowadays, new computers use uefi gpt boot mode to adapt to new operating systems such as win8 and win10. However, most systems before win7 do not support uefi, but use legacy boot mode. The hard disk partition table is mbr. instead of gpt.

The operating environment of this tutorial: Windows 7 system, Dell G3 computer.

This depends on which computer system is used. If you install win7 64, please select legacy only or old version first, and check if there is a secure boot option in the bios. If so, set it to disable.

Because now new computers use uefi gpt boot mode to adapt to new operating systems such as win8 and win10. However, most systems before win7 do not support uefi, but use legacy boot mode. The hard disk partition table is mbr , instead of gpt. If you want to install a system before win7 on a new model, you must change uefi to legacy, and then change the hard disk partition table gpt to mbr.

Extended information:

The difference between Legacy UEFI mode and UEFI mode:

1. Legacy UEFI boot mode is based on certain computer hardware devices and The operating system (such as WinXP/7) does not yet support UEFI BIOS-based situations. Consider starting from the traditional BIOS boot mode. Legacy BIOS boot mode allows HBA, module devices to use Rom options.

2. The UEFI boot mode is used for the operating system to automatically load from the pre-boot operating environment to an operating system, thereby simplifying the boot process and saving time. It also supports hard drives above 2T and strengthens hardware support. The reason why Win8 starts quickly is related to Win8’s native support for UEFI mode.

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