A good protection requires a strong password.
Since a strong password can be hard to remember, many people use a password manager to keep it.
Cain & Abel is officially described as a tool to help anyone recover passwords in Windows.

It uses various password recovery methods.
Some antivirus software may detect Cain & Abel as a harmful object.
The latest stable version was released in April 2014.

Cain & Abel requires Winpcap packet driver.
Cain & Abel can be a great help in such a situation.
It may work, or it may not.
Nevertheless, even a slightest chance is worth a try when you lose a crucial password.