1. First of all you need to create a Linux LivebCd through linux ISO File.
2. Now boot this CD in your computer through boot menu.
3. Now there navigate to C:WindowsSystem32.
4. And there rename sethc.exe to sethc1.exe.
5. And rename cmd.exe to sethc.exe.
6. Now simply restart your computer.
7. Now you will see you login screen, simply press shift button five times.
8. You will see command prompt will open
9. There type net user and hit enter.
10. Now you will see the name of administrator account note it down.
11. Now type net user user_name new
password and hit enter as shown in screenshots.
