How to Defragment Hard drives?

If your computer is running very slow and you have deleted all the unused programs but still it does not give the speed you want, then try defragment your computer drives.This process is very useful and easy. Follow the steps given below

STEPS :

• Click on Start button and go to All Programs.
• Now click on Accessories and then select System Tools.
• It will open a side tray, select the Disk Defragment option.
• Now on the Disk Defragment dialog box, click on the drives you want to defragment.
• Click on Defragment to start the process.