Hold shift while pressing restart and then select Use another Operating System from the displayed options.
This will allow the system to boot into the recovery partition (choose Recover Operating System).
This option will reboot into the SquareOne Recovery Tool which offers a similar menu to the USB recovery key, limited to the following options:
- Capture: capture windows OS to disk
- Restore: Restore to the image currently held in the recovery partition
Warning: Selecting “Restore OS” will wipe ALL files from the main system drive using the image that is contained on the recovery partition.