Deleting Administrator Password Without any software
Boot up with an alternate OS and delete the sam.exe and sam.log files from Windowssystem32config in your hard drive. Now when you boot up again in windows the password on your built-in administrator account which will be blank (i.e No password). This solution works only if your hard drive is FAT type.
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.
(Dont 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.