When you use hibernate in Vista (just like in XP) it creates a file called hiberfil.sys. This file can grow rather large,if you don’t use hibernate, the hibernate file hiberfil.sys is sometimes large enough to impact the amount of drive space you have available, and you’re not able to delete it because it’s in use.

Here is how you go on doing it.

1) To be able to get rid of this file you have to shutdown and disable hibernation in Windows Vista. You can do this by opening a command prompt as administrator

2) In the command prompt type "powercfg -h off" and hit ENTER (see figure 2, it should give you no message back, no errors just blank

Tags | General, Microsoft, Windows Vista