Do you ever wondering why the free disk space on your system drive (typically C:\ drive) always shrinking and become lesser and lesser? Even without installing new programs or downloading big files from Internet, the used space in local disk drive been increasing and become larger without reason, even uninstalling some software programs does not help to reduce or control amount of space used.

It’s unbelievable that Vista system itself unable to keep consistent usage rate of disk space and keep shrinking available amount of free space. In fact, the issue of unreasonable small and shrinking free space has been one of the top question for Windows Vista. There are various possible reasons for ever increasing disk space usage by Vista. Use the following tips and tricks to identify and find out why the disk space keep reducing and shrinking, which processes or programs that take up huge amount of disk space, and how to fix the low running space problem.

But note that some of the tips involve system tweaking and optimization. Vista enables and turns on these processes and programs not without reason. In fact, some of the processes is important for improved system speed. Thus, it’s recommended to try out whether settings best suit your system before implementing the suggestions to recover and reclaim disk space in Vista.

Some of the big disk space occupiers are by the following processes and its associated files:

hiberfil.sys Hibernation File

hiberfil.sys is a hidden system file in system drive, which has the same size with the amou