Before you can flash a recovery image on your Surface Duo, you need to put it in recovery mode first. This is fairly straight forward process that will require you to press a combination of buttons in the right order.
NOTE: To be on the safe side, make sure Surface Duo is charged to at least 50% or more before attempting any recovery procedures.
NOTE: Unplug the USB-C cable from Surface Duo if you have it connected to a PC.
Step 1: Power off Surface Duo.
Step 2: Once powered off, press and hold the Volume Down button, then press and release and Power button while continuing to to hold Volume Down.
Step 3: Once you see a menu on the left screen, release the Volume Down botton.
Step 4: Use the Volume Down button to switch between the multiple menus. Switch to the red “Recovery Mode” menu, and press the Power button to confirm.
You should now be in the familiar Android recovery mode interface. If you need it, you can follow our guide on how to use a Surface Duo Recovery Image to restore your Surface Duo.
The Surface Guide 