The best way to delete hiberfil.sys is to disable hibernation in Windows:

1. Go to Start menu, type “cmd” open up command prompt
2. Type “powercfg.exe -h off” [make sure you are an Administrator]
3. ENTER
4. Type “exit”
5. ENTER
6. RESTART YOUR PC and you are all set

After the restart, you should be able to see more free space on your hard drive.

This generally works for 90% of the time but if it doesn’t work for you then you can refer to other available methods.