The results of an online poll conducted by Vizu Corporation more than 42% of PC users do not defrag their computers with 16% of all participants not even knowing what it meant. Disk defragmentation, or defragging, is simply the process of reorganizing and rewriting files in your computer so that they occupy one large continuous area on your hard disk rather than several smaller areas. Defragmentation is necessary if you want your computer to perform at its best. Fragmentation occurs due to the normal computer activity. Each time you save, delete, or modify a file you contribute to the fragmentation of your system. This results in slower processing time until the computer is “cleaned up” through defragmentation.