Free disk defragger

Over time the files on your hard drive get split up into many smaller pieces. This slows down the speed of access to your files.
The free defrag program http://www.defraggler.com/download will help " put the files back together" and so speed up your system.
The program gives you a number of options including just to defrag the files which are most badly affected making the whole procedure much faster that a full disk defrag using the inbuilt XP or Vista programs.