You'll need to boot from the DVD number 1 disk if you have only two. Start the laptop then insert the first DVD. (usually bios is set to boot from the DVD drive). Shut down the laptop via the power button. Start again via the power button and you should see ' press any key to boot from CD',then press a key and it should start booting from the recovery DVD disc.
Sony Vaio Z Canvas release date, price and specs: Another Surface Pro rival but for the US