The BIOS setup utility closes and the computer boots into Windows. In the BIOS Setup utility, select the File tab. The BIOS settings menu is accessible by pressing the f2 or f6 key on some computers. Note that the Compatibility Support Module (CSM) may not be present on all UEFI PCs. While the display is blank, press the f10 key to enter the BIOS settings menu. Now you've set a Windows 8 PC to boot with Legacy BIOS mode instead of UEFI mode.
In this article I walkthrough how to disable UEFI and enable Legacy/CSM boot support.Įnable Legacy/CSM Boot Support in UEFI FirmwareĬlick the Power icon from the Windows 8 sign-in screen, press and hold the Shift key, and then click Restart.
This can help improve compatibility with older operating systems that weren't designed with UEFI in mind - Windows 7, Ubuntu, Linux, for example. In this mode, the UEFI firmware functions as a standard BIOS instead of UEFI firmware. Many computers with UEFI firmware will allow you to enable a legacy BIOS compatibility mode.