Unlock my computer

Hi mt dear,,,,,,,,
Here are the complete Instructions:

1. **Very IMPORTANT** Before starting anything, make sure you have the ORIGINAL Cingular SIM inserted in your laptop. It will NOT unlock if you have your T-Mobile SIM inside during the unlocking phase.
   
2. Enable your wireless WAN. In Cingular?s Connection Manager, under network info, record the IMEI #.
   
3. Open Hyper Terminal (click on Start, All Programs, Accessories, Communications, Hyper Terminal)
   
4. Connect to COM4
   
5. Type AT and check if you get an OK echo.
   
6. 
   
7. If you do, call Sony?s customer service and request to speak with level 2 support
   
8. Make sure you tell them you want to unlock your laptop?s built-in EDGE modem and you need the NCQU number. (This is an eight digit number.)
   
9. Type ?AT+CLCK=PN,0,xxxxxxxx? (no quotes) in Hyper Terminal, where the XXXXXXXX is your NCQU number and check if you get an OK echo from the terminal. Try it several times, if you don?t get an instant OK, but do not hang up. If it doesn?t work, check the IMEI and the NCQU with the CSR once again.
   
10. Close and Shut down Computer. Take out the Cingular SIM. Insert the T-Mobile SIM.
    
11. Open SMARTWI and open up the Cingular Connection Manager.
    
12. Click on ?Profile,? Then look for the ?ADD? button at the bottom of the window. Click on ?Create Custom Profile?.
    
13. Fill these in:
    Service Type: packet or cicuit
    Dialed: *99***1# ( leave it like that )
    Acess Point Name: (internet2.voicestream.com)
    Username: (LEAVE BLANK)
    Password: (LEAVE BLANK)
    
14. Click next. On IP Settings leave everything on Automatic. Click Next again.
    
15. In the ?Profile Name? slot, Type in T-Mobile or whatever you want. Then Click ?Finish?
    
16. You?re all set to Connect to T-Mobile Internet and avoid the frickin Cingular monthly $79.99 Ripoff to connect.
    
17. Hopes this clears things up. Enjoy! regards JAN_yuanjia rate it plss
    

Here the fix,

Please Remember, Do not Perform these steps on any computer that does not belong to you. 
I would not be responsible if you perform any unethical practices using this tehnique. 
I am giving these steps thinking that you lost the password of your own computer on which you have rights to perform any operations.

Download this ISO file of "ophcrack XP LiveCD"
The size of this file is 452.4 MB.

Here's the link,
http://downloads.sourceforge.net/ophcrack/ophcrack-xp-livecd-2.1.0.iso

After downloading burn this image on a CD using any disc burning software..

Now, on your computer, set your CD Drive as First Bootable drive by going into BIOS settings.
Make sure that the disc is inside the cd drive.
On the first screen, simply press the Enter key to load the OS in memory and after loading it will auto launch the ophcrack window that will show all accounts that exists in the Windows XP partition including the guest account (even if it was disable as you said).
On this window, select the Administrator account of Win XP and click "Launch" in the toolbar.
Now, it may take some time depending on the complexity of the password.
Please remember, it fail to crack very strong passwords. But the probability of success is much higher since its the best software to recover windows passwords.

Please let me know if you need any additional information.