Defraggler is an application to defrag your hard disk. Over time when you delete files and write new ones in their place, the bigger files take the space the smaller ones did and also write on the disk elsewhere so eventually files and pieces of files are scattered around the disk. This makes for a cluttered disk that takes longer to read files from the disk as they are not in a sequential line. This application is far superior to the defragmenter built in to Windows and it is much faster! visit the website by clicking on the screenshot below!