Update creating login problem

I have Comodo v 3.8.65951.477. I have XP Pro SP3. I do not use a login password. However, when I let CO update XP asks for password login which I do not have. I was able to use safe mode and do a system restore to undo Comodo update. I let it update itself and again it repeated the problem.

Why is Comodo altering my login process?

Anyone? ???

I have the same problem