If the laptop is in a mess there is probably a hidden partition from which you can do a factory restore... however you will lose all your data and have to reinstall all your applications.
Make and model ?
Surface Pro (2017) vs Surface Pro 4
Where HTML5 is headed next
MacBook Pro v Surface Pro 5
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.