As you know by now, Microsoft Windows 7’s Disk Defragmenter is configured to run on a regular schedule right out of the box. And, when it runs, it is hidden in the background with no visible interface or icon. This means that Disk Defragmenter will always keep your hard disk in tip-top shape and you never even have to think about defragmenting your hard disk.
Even though the disk defragmenting operation is totally automated in Windows 7, such that you really never need manually run the utility, the user interface in Disk Defragmenter has been redesigned so that it can provide you with detailed defragmentation status information allowing you to monitor the progress of the operation if you wish to run it manually. Read more.