Have you tried starting in safe mode.
Whatever version of Windows that you are using you could borrow a disc from a neighbor or friend and do a repair or a reformat whatever you wish,if a reformat just add the keycode on the side of the computer.
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.