How can open password protected microsoft word document.

Go to this link to get Excel/Word Cracker to remove the password protection.

http://www.download.com/Ms-Word-Excel-Cracker/3000-2092_4-10656419.html

HI, Don't worry. I recommend you three password recovery tools, anyone of which can solve your problem with great ease.
This first one is Word Password Unlocker(http://www.passwordunlocker.com/products/wrpu.html), which is specially to remove ms word passwords including password to open and password to edit.
The second one is Office Password Unlocker(http://www.passwordunlocker.com/products/opu.html), which is office password recovery kits. Including password recovery tools for ms word and ms excel.
The third one is Password Unlocker Bundles(http://www.passwordunlocker.com/products/pub.html). This program is an all-in-one password recovery kit. It contains rar password recoverytool, windows password recovery tool, office password recovery tool, ms word password recoverytool, ms excel password recoverytool, winzip password recovery tool and pdf password recoverytool ,ect