How do i delete linux mint 17.1

[Antarctic]

The title summs it up, i don't know how to delete linux, or how to format my hard drive, i just got this pc and it came with linux mint 17.1. Any help guys ?

 

[Rabmac]

If you have a mechanical hard drive, one method would be to wipe your hard drive using DBAN: http://www.dban.org/

Once it is wiped you can install your new OS.