http://altroid.blogspot.in/2013/07/password-protected-file-without-using.html password protected file without using any software using batch file programming . CODE TO BE COPIED http://tinyurl.com/m5c4tyn hange the password replace altroid with 'new password' in the above code You might be thinking that anyone can access the password by opening that lock.bat file in Notepad or any other text editor. To make it more secure hide lock.bat in some secure location after following the above tutorial To access the secured file double click on lock.bat. we would suggest copying lock.bat file into Pendrive and copying it into your computer whenever you required to access to your protected file video link at http://www.youtube.com/watch?v=qO2U58iPREs&list=LLa4orTjm-XmwMv8KJiKsn3Q