Disk defrag rearranges files on your hard drive. Its supposed to help speed up the systems speed for accessing files but with hard drive speeds these days disk defrags dont increase performance by a noticable amount
It's a tool to re-organize the position of files and file fragments on a hard drive.
Disk Defragmentation
Double-click My Computer, right-click the disk to defragment, and choose Properties > Tools > Defragment Now.
Monthly
Perfect disk, they even claim that it supports SSDs.
Disk Defragmentation
The same way you defragment a normal PC hard drive. Hook it up, right click the drive in My Computer, go to tools, an among, disk clean up and error checking, there should be the option to defragment it. Once your there, just click defragment.
that all it programed to do speeds up you OS
No. Chkdsk may find disk errors relating to bad sectors. You want to correct these errors, locking out the bad sectors, before you defragment the disk. This is because a defrag will rearrange vast amounts of information that is on the disk, and you don't want portions of previously-readable files moved to bad sectors and be thus made unreadable.
To organize the way that files are stored on a computer disk, so that all the information belonging to a file, is stored on a single contiguous area on the disk.
Best thing would be to defragment the hard drive. I recommend Defraggler by Piriform. Also deleting temp files and doing a disk check will help.
To open Disk Defragmenter, click Start, point to All Programs, point to Accessories, point to System Tools, and then click Disk Defragmenter.
It's called disk defragmenting, Vista, Start Menu, All Programs, Accessories, System Tools, Disk Defragmenter It should be scheduled, unless you changed it, for 3 a.m. You can change that if you click Modify Schedule. You can also choose which disks to defragment with the Select Volumes button. If you want to defragment now, click Defragment Now, like you coulded have guessed that. It can take from a few minutes to a couple hours. Sorry, but I've forgotten how to do it with xp. Hope this helps!