The best way to delete hiberfil.sys is to disable hibernation in Windows:
- Go to Start menu, type “cmd” open up command prompt
- Type “powercfg.exe -h off” [make sure you are an Administrator]
- Type “exit”
- 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.