I am just learning how the Win 7 Page File system works and discovered these protected files need special software to defrag. One such program, Page Defrag, is recommended by ComputerHope. Is there any reason for me to download and analyze my HD? The Page Defrag documentation says it is best used with another app called Contig defragmenter. I would like to use these apps but am concerned I will screw-up my otherwise great working system.