How to disable Hibernate on Windows Vista

For some space saving on your hard drive or maybe some other reason, you might want to disable hibernate functionality on your PC.
To do this:

Open cmd with administrator privileges (navigate to C:\windows\system32\ find cmd.exe, right click it and choose Run as Administrator)
Enter command "powercfg -h off" and hit Enter (screenshot)

Links:
http://www.windowsnetworking.com/kbase/WindowsTips/WindowsVista/AdminTips/Misc/Disablehibernation.html