Re: Windows Live Messenger Keeps Forgetting My Sign In Details When I Restart My Comp
you might not find this useful, i keep saying it to a lot of people. you might want to give aMSN a try. it's a replacement for the official MSN client, that incorporates quite a lot of useful features that Microsoft's implementation doesn't.
i know that doesn't really directly answer your question. all i can think of is that i have seen MSN clients lose passwords if the pc is shutdown/restarted without the client being closed. also the password is removed on a failed login if i remember correctly.