BUG #4668: Windows installer package

The following bug has been logged online:

Bug reference:      4668
Logged by:          Prachi
Email address:      prachiar2@gmail.com
PostgreSQL version: 8.0
Operating system:   Windows XP
Description:        Windows installer package
Details:

I had installed Postgres 8.0 on Windows XP but due to some promblem I
uninstalled it.

Now I am trying to install it again using the same setup i.e.
postgresql-8.0.msi but it is giving error as

invalid username specified: logon failure: unknown username or bad
password.

Please help me to solve this bug as it is urgent for me to work on postgres.