How can you gain access to windows m/c after forgetting password

Did you think that if you forget admin password, thats the end of the world for recovery. Guess not. Here is a brief writeup on how to gain access to a windows NT/2000/XP machine if you forget administrator password. This document discusses common ways to gain access. It list down various free tools out there using which you can either access the data or reset the password. Very handy at times