If you don’t use hibernation, hiberfil.sys is a waste of harddrive space. It stores the contains of RAM when the system hibernates, so is the same size as your system RAM. In my case it was taking up over 8GB of space.

1. Open the Start menu, type in Command, right-click on Command Prompt and select Run as Administrator.
2. If prompted to confirm click Yes.
3. Type in powercfg.exe -h off, then press ENTER.

Done. Hibernation is disabled and the file is automatically removed.