We want to help you but we need more information. Glitch? Exactly what happened? Did you reinstall Money 2005? Is the password one that is linked to your Microsoft account?
There are different things that cause an error message about passwords. What are you doing when you receive the error message?
Note that the password is associated with your .mny file. You can't change it without opening the file. And to do that, you need to use the password that was in effect when you last opened the .mny file.
Bill Becker