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Put simply - it's a utility that organises files on a disk. When you try to save a file, Windows simply looks for the first available piece of blank space - whether it's large enough to hold the whole file or not. It saves as much of the file as it can in the available space, then looks for another piece of blank space. This results in fragments of files being saved all over the disk.

Disk defragmenter programs use large areas of blank space on the disk to 'join up' all the fragments of each file into complete files, before writing them in one 'chunk'. Defragmenting the disk regularly - especially if the disk is more than 80% full keeps your computer running at optimal speed.

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What is The Windows utility that is designed to reorganize the data on your hard drive so that your computer runs more efficiently is called?

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