It is known to all PC users that a simple defragmentation will greatly speed up a computer. But not all know when and how to defragment computer. If you are someone who wants to speed up you computer with simplest method, please do not miss this article.

Defragmentation is a process that rearranges the files on the computer, making them always close together and contiguously locate at the same directory of the hard disk. Hence, it will be much easier to access when necessary, which will reduce the movement of the hard disk and speed up the computer. So it is necessary for us to defragment the computer when in the below cases, in order to make the coming files always coherent and speed up the computer:

1) When installing some new programs or new version of the Windows update on the computer.
2) When storing large amount of files/folders on the computer.
3) When there is only 15% or less than 15% free available hard disk space.

Most of the time, to ensure a thorough and faster defragmentation, it is necessary for us to do some preparation before defragmenting the computer. Below is what recommended so much by others:

1) Run a disk cleanup before the defragmation: go to My Computer -> right click the drive to be cleaned to select Properties -> General -> press Disk Cleanup to begin the process.
2) Run a error- checking to scan and correct some hard disk errors: go to My Computer -> right click the drive to be checked to select Properties -> Tools -> click Error-checking.
3 ) Most of the time, it is recommended that you can first close all other running programs before running the disk defragmentation, especialy remember to close the anti-virus programs the provides a real-time safeguard feature from the right bottom of the desktop.

Above is what you should know when defragmenting the computer. Then you can run the windows built-in defragenter to defragment the computer, speeding it up all the time.

Notes:
1) Please do not defragment a partition which has Ghost system backup files for it will results in errors when doing a system recovery.
2) If you cannot defragment the computer smoothly in normal mode, please first boot the computer into safe mode and the defragment it.
3) It is much better to defragment the computer with a special designed defrag program because of the limitation of the windows built-in defragmenter. And I think Advanced Defrag will be a better one.