removing identity

[Terry]

I am using MS XP, outlook express 6

I have 2 identities that appear in the log on window when i start Outlook
Express 6, both require a password..

Problem is i want to remove one of them but the program prompts me for a
password, which i do not have....there is a password associated with the user
name but i do not know it...

is there anyway to remove this identity with out the password?? or is there
anyway for me to determine the password??

I can find my way around the computer but am by no means an advanced user or
expert...

thanks in advance for you help