What is Legacy Boot Mode?

Shut down the computer, and then boot it again. However, when the manufacturer’s logo appears, press the manufacturer’s key to launch Windows firmware menus. Depending on your PC brand, the manufacturer’s key will differ: it could be Delete, Esc, F1, F2, F10, F11, or F12. Nevertheless, during the Windows startup process, a screen usually tells you to press a particular key to open "Advanced Settings;" whatever key is indicated on that screen is your manufacturer's key.

Now at the Firmware Menus screen, look out for these types of options: UEFI: USB Drive or BIOS: Network/LAN. However, there may be other similar options, such as UEFI USB Drive and BIOS USB Drive. When you see this, it simply implies that either of the commands will boot your PC from a USB device/media, but in different firmware modes (UEFI or BIOS).

• Go to the UEFI setup menu.

• Look out for Legacy Support and set it to “Enabled”.

• Boot Device Control

• CSM

• Launch CSM

• Legacy CSM

• UEFI/Legacy Boot (set to Legacy Only or both)

• UEFI/Legacy Boot Priority (select any of the options besides UEFI Only)

• Boot Mode (Legacy Support)

• Boot Option Filter (select any of the options besides UEFI Only)

If you lost some of your files while trying to activate Legacy Boot Mode on your Windows system, do not worry. With reliable data recovery software like DiskInternals Partition Recovery, you can easily get back all the lost files. DiskInternals Partition Recovery is an advanced utility that is packed with handy data recovery features. It works for all types of storage devices (internal and external), and supports multiple Windows file systems. Best of all, the software is intuitive and very easy to use.