How to break Windows 8,7, vista Authentication ?

How to break Windows 8,7, vista Authentication ?

Step for Windows 7, 8,Vista

Setp 1. Goto  C:\Windows\System32

Setp 2. Right Click on sethc.exe and Run as administrator.

Setp 3. Again Right Click on sethc.exe, Open Properties.

Setp 4. Click on Advance tab, then on Owner.

Step 5.  Click edit, change the owner from “trusted installer” to “Administrator” and click apply

Step 6. Copy the sethc.exe at different location for backup purpose

Step 7. Rename  cmd.exe to sethc.exe

Step 8. Now log off and in press the key 5 times

Step 9. Now it's open the cmd 

Step 10. From cmd U can change the password , and do many more things