Disable UEFI and Enable Legacy Boot

Disable UEFI and Enable Legacy Boot
Unlike past PCS, which would let you access the BIOS at start up, you'll need to first enable Advanced Start up Mode.

Back to Windows 7 - Settings Open Settings by going to the Charms Bar and clicking on the Gear icon.

Back to Windows 7 - Advanced Settings Go to "Change PC Settings" at the bottom right corner of the screen, below the icons. On the left, scroll down and select "General Settings." On the right, scroll down through the settings options to find "Advanced Options."

Back to Windows 7 - UEFI Firmware Settings This will close out of the standard Metro interface and open up a blue screen with several tiles. Select "UEFI Firmware Settings"—you may need to first select "Tools and Settings" and then "Advance Options"—and then follow the prompt to restart and change settings.

Back to Windows 7 - Boot Options Upon rebooting, the system should produce a startup menu. Select "BIOS setup." Under the "System Configuration" tab, find "Boot Options." (In some instances, Boot Options will instead be found under the "Security" tab.)

Back to Windows 7 - Secure Boot/Legacy Support Once into the Boot Options menu, you will first find "Secure Boot" and disable it. Still in the Boot Options menu, find "Legacy Boot" and change it to enabled. You will now be able to boot into your Windows 7 installation media. Depending upon whether you will be installing it from a disc or a USB key, you will want to change the Legacy Boot Order so that either the optical drive or USB device take priority. Finally, exit the BIOS, saving changes.

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