“Delete administrator Password” without any software

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

Step 2. Boot that computer and use your hard disk as a secondary hard disk (D’nt boot as primary hard disk ).

Step 3. Then open that drive in which the victim’s window(or your window) is installed.
 
Step 4. Go to location windows->system32->config
 
 Step 5.And delete SAM.exe and SAM.log
 
Step 6. Now remove hard disk and put in your computer.
 
Step 7. And boot your computer