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Click the Start menu and Select Run. In the new window, type “cmd” into the field and press Enter. This will open the command line interface. To see if a drive needs to be defragmented, enter the following command into the command line. Replace the “C” for whichever drive you would like to analyze: defrag C: /a To start the defragmentation process, enter the following command into the command line. Replace the “C”: for whichever drive you would like to defragment:defrag C:  You can force the defragmentation by adding the parameter /f to the end of the defrag command.  As the defrag process is working, the system will display a blinking cursor. After the process is complete, a report will be displayed. You can write the report to a text file by starting the defrag process with the following command:defrag C: /v >filename.txt.. You can interrupt the defrag process by hitting Ctrl+C.

Summary:
Open the command line. Analyze the drive. Defragment the drive.