If you are do a lot of download large file like file movie, music and etc or copy and delete file on your windows system, that´s probably you need a time to defrag your disk. Windows save your file on disk by chunk of file; normally windows will be save your file by chunk/piece of file together and contiguously on the physical disk. Fragmentation will be happened when windows cannot allocate enough space for it, windows will same the file in others space which not continues or sequential, it´s a gap exist for one file. For the large file sometimes can happen in the many of place. A lot of fragmentation can cause slow performance for read and write. To arrange the file on the physical disk, you can use tools come from window, disk Defragment. Disk Defragment can provide arrange file on the physical disk, but you need some space for disk Defragment temporary move. Ideally, every month you need to run disk defragment or every time you are do delete or move large file on your computer disk or every time you are do clean up your windows temporary file.

Since Windows 95, Disk Defragmenter is free tools come from windows installer. You can use Disk defragment without any additional install or download. Disk defragment is safe to use without any windows technical experience, if you are ever using disk defragment provide by windows. Here the step by step to use the tool:

Thing to do before do disk defragment :

• Close any application running before do disk defragment, some of the application need temporary files which do write on the disk. Because disk defragment do re-arrange file on your disk, if not its can take a long time for disk defragment because a lot of activity write and delete file.
• Sometimes Disk Defragment can take long time for process re-arrange file on the disk especially if you are never doing disk defragment and have a lot of copy/delete/move/download files. Make sure you have time not using your computer.
• Don´t do any write disk activity like copy/download/delete files together with disk defragment.

Here how you are using disk defragment on windows 7.

Click Start->Control Panel->System and Security->Administrative Tools->Defragment your hard drive

For any windows version which included disk defragment.

You can click start->computer (Or My Computer) and right click any disk local disk (example C:\), click properties->tools->Defragment Now

Disk Defragment look and view in windows 7

You will see the disk which can do disk defragment by the tools. Disk Defragment provides two main functions for Analyze Disk and Defragment disk. You can do parallel for multi disk by hold shift key and click any disk you want do analyze or defragment.

By do analyze disk you can see how much total fragmented in % for your hard drive.

You can also using schedule to do automatically defragment by select configure schedule for windows 7.

Sometimes by period maintenance you can increase your windows performance dramatic.

If you just cleans your disk by deleting lot of file or big files, that´s good to do disk defragment also.