DISABLE HIBERNATE MODE

The hibernation file which allows a user to use hibernation mode takes up a lot of space. If you use this feature you are allocating/creating space so that when you come back everything (programs and folders) are still open. If you don't use it that much then there's not much sense keeping it. So you may remove it. Go to Start->Control Panel->Power Options->Hibernate tab and uncheck Enable hibernation. That should remove the actual hibernation file. You may double check by doing a Search (F3 key) and search for hiberfil.sys in the C: drive. It shouldn't be found, but if it is, you may safely delete it.