Whenever you defrag your hard drive (using the tool which ships with Windows), you might notice there is a big green block which not movable. For the most part this green block is your Windows page file. Typically the way to make sure this gets defragged is to simply “delete it” by (steps abbreviated) removing the page file, defragging the hard drive and then re-setup the page file. Instead of this workaround, defrag the page file directly by using Sysinternals PageDefrag tool.

This free tool does just what you think, defrags your page file:

PageDefrag uses advanced techniques to provide you what commercial defragmenters cannot: the ability for you to see how fragmented your paging files and Registry hives are, and to defragment them. In addition, it defragments event log files and Windows 2000/XP hibernation files (where system memory is saved when you hibernate a laptop).

This tool is ideal to run on a fairly regular basis to prevent your virtual memory and registry information from becoming too jumbled.