There are several ways to do it, but I like the easiest and fastest. For this option through the windows Registry aside.

And so all default file hiberfil.sys occupying space on hard drive equal to the amount of operational memory. Up to a point it does not bother anyone and not annoying. Usually think about it, the owners of hard drives in laptops or PC. First I would advise you to think twice, and the second as a rule do not use it. On this to remove this file in a single click:

Open as Administrator "console" CMD.exe and enter the following command:

powercfg -h off

Now I can watch the space and be happy. :)
But really most of all frees up disk space C: transfer user profile to another drive. This, too, will write later. There movements a little more, but the bonuses from this is also greater.