Suppose when we browse a web and simultaneously download a song , install a software and write something in the hard disk . The data written in the hard disk will not be contagious and hence the platter has to move across the hard disk to perform a particular task .This becomes a worse case scenario when many such files are spread across the hard disk, every time platter has to move over the hard disk to recover the data . This will drastically increase the time taken to read a file from the hard disk . And this will also decrease the performance of the computer . In order to solve this problem of fragmentation , disk de-fragmenter can be used to de-fragment the hard disk . Here is a list of best defragmenters available.

Defraggler
MyDefrag
UltraDefrag
DiskTune
Diskeeper
Auslogics Disk Defrag
DiskTune
Diskeeper
PerfectDisk

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