Changing your password from time to time is a good practice.

Here is how to do it;

1. Hold the "ALT" and "CTRL" keys down and press the "DELETE" Key
2. A new window will open.
   
3. Select "Change Password"
   
4. Enter your current Password
5. Enter your new Password
6. Confirm your new Password
7. Press "OK"
   
8. Select "Cancel"

Your Password has now been changed