How to Protect Document Using Password in Ms. Office Word 2007

In Microsoft Office Word  2007, (same for others office 2007  Ms. excel 2007 and Ms. Power  Point 2007) to protect a file or document with a password is very simple, 
• Inside the document,  Go to Save As ( Klick at Office Button, then klickSave as ) 

  

• In Save As window, Click on  Tools, then click General Options

 • There are two options, password to open, and password to modify, we can use one or both of them.
 • Enter a password what we want
 • Click OK and reenter the password

  
• Save the document as usual ( give a name and click Save )


Now the file are protected, try to reopen.