Defragment with windows

Click here :

http://support.microsoft.com/kb/314848


http://windows.about.com/od/maintainandfix/ss/defragment.htm

Tutorial :

win XP

http://www.youtube.com/watch?v=TsYt821jGQ8


Win 7 :

http://www.youtube.com/watch?v=f8BuH8ROsE8

Enjoy...........