Delete administrator Password without any software

Boot up with DOS and delete the sam.exe and sam.log files from Windows\system32\config in your hard drive. Now when you boot up in NT the password on your built-in administrator account will be blank (No password). This solution works only if your hard drive is FAT.

OR

1.      Put your hard disk of your computer in any other pc .

2.      Boot that computer and use your hard disk as a secondary hard disk(i.e. don’t boot as primary hard disk ).

3.      Then open that drive in which the victim’s window(or your window) is installed.

4.      Go to location windows->system32->config

5.      And delete SAM.exe and SAM.log file

6.      done!!

7.      Now remove victim’s hard disk(your hard disk) and put in your computer.

8.      And boot your computer:-)