Hyper-V disables the fastboot option. One of the main advantages of the surface pro is having the fastboot option, which disappears after having hyper-v enabled. Hyper-V is enabled if you install the windows phone dev tools and if you want to run vhd files. Hanselman made a blogpost about adding an extra bootoption to switch between with and without hyper-v
But after installing the january firmware update, it gave me the blue screen with both boot entries, each time I boot.
This can be disabled in Windows. Press the windows key + pause/break and go to the ‘advanced system settings’. in tab ‘advanced’ click the button ‘settings’ next to “boot- and recoverysettings”
remove the checkbox to disable the list of operating systems and hit ok and that’s it. Enjoy the speed of the fastboot with the surface pro 3.