Windows 10 usually sticks the recovery media on a partition. Keep hitting f10 during start-up. Should be able to repair if it starts.
If the disk partitions are utterly goosed then,
Friendly techie mate who will look disappointed but will fix it anyway?
Work IT department who can give you a recovery USB?
Warranty – take it back?
The USB repair works pretty well usually for Windows 10. Library, mates house or anywhere else with internet access where you can download and create the recovery USB – link to the M$ page here:
http://windows.microsoft.com/en-us/windows-10/windows-10-recovery-options
Without looking, I am always suspicious when something “just breaks” as they don’t usually “just break”.
Normal IT question for support, what were you doing before it stopped working? Do you need to do what you did, if not, don’t do it again 🙂
If the disk is on it’s way out or there’s another hardware fault you could be polishing a turd by fixing it. Either buy a new one or find a techie mate who knows how to diagnose and fix laptops.