Problem about laptop?please ask me...

Assalamualaikum to everyone.
First of all, I would like to show on how to solve problem if hard disk doesn't exist when format windows...

this call Debug law level format...

follow this steps.

1- Insert Driver ultilities CD and press F12 (If you don't have cd,what you can do?it is only press button F8 or left/right arrow after switch on the laptop
then come out list of command. Please choose debug and proceed to the step 6.
2- Boot CD or DVD.
3- Follow the instruction and press enter.
4- There are two command in main menu will appear. Press Q.
5- It will shown as below:


F:debug
Press enter.

6- type as below in CMD.
-f 200 l1000 0
-a cs:100
-there will be a number on the left side. Type mov ax,301
-There will be 0103- type mov dx,200
-There will be 0106- type mov cx,1
-There will be 0109- type mov dx,80
-There will be 010c- type int 13
-There will be 010E- type int 20
-There will be 0110- press enter.

7- dash symbol will appear, type g and press enter.
8- remove the CD and shut down the laptop.
9- progress as usual.