At the Windows Setup screen, press Shift + F10 to open a command prompt.ģ. After you convert Legacy BIOS to UEFI boot mode, you can boot your computer from a Windows installation disk.Ģ. Normally, you need to reinstall Windows for changing to UEFI mode because you need to wipe the hard drive and then convert it to a GPT disk.ġ. Is it necessary to reinstall Windows 10/8/7 for UEFI mode? In Legacy mode, Windows can only boot from a master boot record (MBR) disk that has a 2TB size limit while UEFI mode works with a GUID partition table (GPT) that allows you to use disks of enormous size. If you are using Windows 7 64-bit, Windows 8/8.1, or Windows 10, you can change Legacy to UEFI mode to get better performance and disk support. At present, most UEFI-enabled systems have a Legacy boot mode to be compatible with older systems. UEFI is now well on its way to replacing BIOS which by now is an outdated standard, well over 40 years old! And Microsoft proclaims that Windows 11 system only supports UEFI.
All new hardware nowadays uses the unified extensible firmware interface (UEFI) instead of the traditional BIOS.
