it is a program of Microsoft window which is used to arrange file and folder of

it is a program of Microsoft window which is used to arrange file and folder of disk so that the files can be accessed quickly if removes fragment between two or more files .
=>Req steps
1.click on start –all program-accessories-system tool-disk defragmenter .
2.select name of desired drive (c)
3. click on defragmentbutton
=> 2ndmethod
1.press window key +R
2.type DERGUI
3.press enter key
4.select name of drive
5.click on defragment button