Have you even wondered that why it is necessary to clear up disk regularly? It is the same that if your room is in a mess, you really need to clear it up. Since the disk is the room for the files, you are bound to defragment it on time.
Well, in this article, I will tell you the useful knowledge about defragmentation in hope to help you solve the problems in this regard.

First of all, defragmentation is quite helpful for optimizing system performance. The file layout on the disk has great influence on I/O performance. And, excessive and scattered fragments in the disk can damage computer performance seriously. Although Windows XP can re-lay certain files automatically to improve the performance, in the default condition, it is not the necessary system routine to do it and only contains a small part of the files. It can not defragment completely. That is the why you should clear up fragments specially rather than let it done by computer itself.

In this regard, you should perform complete defragmentation immediately after installing the system or uninstalling any program. In the default condition, Windows XP may defragment partly once three days. And the moved files will be written into Layout.ini files which are based on the current usage of disk to adjust physical positions of the files. So, Windows XP is supposed to arrange the physical files in the disk in the mentioned order. Its routine is in the C:\Windows\Prefetch.

System can defragment automatically when there is not so much work to do. At this moment, system will choose the files in the Layout.ini preferentially and defragment them partially. They are the base of defragmentation program to move files.

All in all, it is a must to defragment disk regularly. if you find it is a rather tedious work, you can turn to a useful tool which can save your time and energy a lot