BUG #4557: win32 roll back after install half way to find postgres account existed.

The following bug has been logged online:

Bug reference: 4557
Logged by: Mr Teo
Email address: hoeteo(at)yahoo(dot)com(dot)sg
PostgreSQL version: 8.2 and above
Operating system: XP home edition
Description: win32 roll back after install half way to find postgres
account existed.
Details:

Hi,

I had downloaded to install a msi package postgresql 8.2 and 8.3 .

During the installation, it showed and existed account postgres was found
(installed by 8.29 previously and removed by the uninstall program that come
with) and
it roll back in refusing to continue" Eror"

I used delprof to remove all unused account but it still
detect that there is a postgres account despite the explorer or cmd.exe
windows did not show any. I m using
XP home edition and suspected the msi package having a bug.

Is there any way to get around to remove the unseen postgres account? If the
msi installer come with a choice to delete old hidden account, it will be
easier,
right?

Help needed by Newbie Postgresql user