BUG #5475: Problem during Instalation

The following bug has been logged online:

Bug reference:      5475
Logged by:          Joel Henrique
Email address:      joel@cefet-al.br
PostgreSQL version: 8.4.4-1
Operating system:   Windows 2003 Server
Description:        Problem during Instalation
Details:

When I try to install postgres it asks for a password.
It says that if the service already exists I should put the current
password, otherwise a service will be created with new password.

I've neves installed postgres before. What kind of password is that? I can't
install postgres here.

Thanks!