Using Disk Defragmenter
You might need to be logged on as an administrator or a member of the Administrators group in order to perform some tasks.
Disk Defragmenter consolidates fragmented files and folders on your computer's hard disk, so that each occupies a single, contiguous space on the volume As a result, your system can gain access to your files and folders and save new ones more efficiently. By consolidating your files and folders, Disk Defragmenter also consolidates the volume's free space, making it less likely that new files will be fragmented.
You can also defragment disks from a command line using the defrag command. For more information, click Related Topics.
Open Disk Defragmenter