Is the Surface Pro boot loader unlocked so that I can load other Operating System Windows 7 or locked in to Windows 8?
Like other Windows 8 computer, Surface Pro is boot loader unlocked. You can access BIOS settings and turn off secure boot on Surface Pro, so that you are able to load other Operating System like Windows XP, Windows 7 or linux Ubuntu. Secure boot is a UEFI protocol, and not a Windows 8 feature.
How to turn off secure boot in Surface Pro windows 8
* First boot Surface to the UEFI Firmware Settings in Windows 8 “Advanced Options” UI.
Open charms bar from start screen, tap Setting > Change PC settings > General, and then “Restart now” under Advanced startup. Tap on “Troubleshoot” in the “Choose an option” screen > Advanced options > UEFI Firmware Settings, and “Restart” button.
You can also hold down the Volume Up key on the tablet during the initial stages at boot.
* While Surface are booted directly to an all black screen with two options: Security Device Support, Secure Boot Control.
Tap the space labeled [Enabled], next to Secure Boot Control, and select [Disabled] from pop up prompting. Then tap Exit Setup