If you want to change password of Windows XP but you have lost the older one or you want an access without your elder brothers PC with his permission, then make this tip go on and change the password of the computer without knowing the previous one.
Follow these couple of easy steps :
In start menu go to RUN command and type cmd to enter in DOS shell.
[type] net(space)user(and press enter)
[type] net(space)user(space)[windows login ID](space)*(press enter)
have a look to an example if you are getting confused
Now [type] new password (press enter) and retype it (press enter).. it will show you the confirmation. Your typed password wont be displayed and simple the cursor will be blinking which shows you are done.
for eg : password changed successfully