I think the usual drill is to put the recovery cd in and then reboot (with the cd still in).
/or if it has a hidden partition you have to press (F10 or F11 F12? - look in your manual) to get the recovery menu on screen
Surface Pro (2017) vs Surface Pro 4
20 groundbreaking 3D animation techniques
How to mine Bitcoin on Mac
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.