How to Delete Windows Administrator Password Without Software
Method 1
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 which will be blank (i.e No password).
This solution works only if your hard drive is FAT kind.
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| How to Delete Windows Administrator Password Without Software |
Method 2
Step1.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 (Don't boot as a primary hard disk ).
Step 3.Then open that drive in which the victim’s window(or your window) is installed.
Step 4.Go to locationwindows->system32->config
Step 5.And delete SAM.exe and SAM.log
Step 6.Now remove the hard disk and put in your computer.
Step7.And boot your computer 
